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Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches

Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches

Item # BWGNRK1313-5W
Our Price: $599.00
Fifth Wheel Installation Kit

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Install a Companion fifth-wheel hitch in your truck bed with this custom kit. Better than a traditional mounting kit, this setup doubles as a gooseneck hitch when the fifth wheel is removed, and the underbed design allows for full bed access. 1-636-306-4830 to order B and W fifth wheel installation kit part number BWGNRK1313-5W or order online at Free expert support on all B and W products. Guaranteed Lowest Price and Fastest Shipping for Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches. Fifth Wheel Installation Kit reviews from real customers.
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  • Reviews (25)
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B and W Fifth Wheel Installation Kit - BWGNRK1313-5W

  • Below the Bed
  • Custom
  • B and W

Install a Companion fifth-wheel hitch in your truck bed with this custom kit. Better than a traditional mounting kit, this setup doubles as a gooseneck hitch when the fifth wheel is removed, and the underbed design allows for full bed access.


  • Lets you install your B&W Companion 5th wheel trailer hitch (BWRVK3500 or BWRVK3400)
  • Doubles as heavy-duty Turnoverball gooseneck trailer hitch
    • Includes rails, gooseneck hitch head, safety chain loops, and hitch ball
  • Provides complete truck bed access when you're not towing
    • Single hole in center of bed is mounting point for hitch
  • Installs easily using existing holes in your vehicle's frame
    • No welding or frame drilling required
    • Truck bed does not have to be removed
    • 4" Diameter hole must be cut into bed
  • Powder coated steel is sturdy and corrosion resistant
  • Made in the USA
  • Limited lifetime warranty

B&W Turnoverball Gooseneck Trailer Hitch

B&W Turnoverball Gooseneck Hitch

Not only does this kit provide you with a sturdy, custom base for installing your Companion fifth-wheel trailer hitch in the bed of your truck, but it also doubles as one of the most recognizable gooseneck hitches on the market. This fifth wheel installation kit actually is the Turnoverball gooseneck hitch from B&W.

Gooseneck Specs:

  • Gross towing weight: 30,000 lbs
  • Vertical load limit: 7,500 lbs
  • Ball size: 2-5/16"

B&W Companion Installed in Turnoverball Gooseneck Hitch

With the B&W Turnoverball underbed gooseneck trailer hitch you get the best of both worlds. When you go to tow a gooseneck trailer, the Turnoverball creates a sturdy, dependable connection with your trailer. And when you're done towing, you can stow the ball upside down in the hitch to get full bed access and a clean appearance. When you're ready to tow your fifth wheel trailer, just install the Companion in the ball hole in place of the gooseneck ball and lock the post in place using the built-in handle. You can remove the fifth wheel when you're done towing, leaving your truck bed open once again.

Simple, Custom Installation

This kit is custom designed for your vehicle. The mounting brackets bolt to existing holes in your truck's frame. While some modification is required - you will need to cut a 4" diameter hole in your bed for the hitch ball and drill holes for the built-in safety chain loops - there is no need to weld onto or to drill into your frame.

Once you have the brackets and center section installed, set up the operating handle. This handle is designed to be accessed from the rear driver's-side wheel well. On the end of the handle is the heavy-duty steel pin that secures the mounting post of the Companion (or the base of the gooseneck hitch ball).

GNRM1313 B and W Turn Over Ball Under-Bed Rail Kit

GNRC900 B and W Turn Over Ball Center Section

Installation Details BWGNRK1313-5W Installation instructions

This Product Fits The Following Vehicles

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches - BWGNRK1313-5W

Average Customer Rating:  4.8 out of 5 stars   (25 Customer Reviews)

Install a Companion fifth-wheel hitch in your truck bed with this custom kit. Better than a traditional mounting kit, this setup doubles as a gooseneck hitch when the fifth wheel is removed, and the underbed design allows for full bed access.

2016 Dodge Ram Pickup

Etrailer was great. although they did not have the Reese hitch I originally ordered in stock they called me the next day to discuss my options and I sure glad they did because I change to the B&W hitch re-ordered it on Tuesday and got it on Friday with free shipping.This hitch was very heavy duty and i was very impressed with the quality, and the design of the hitch (awesome). Love how the entire hitch is out of the bed for full access to the bed when not in use, that was a great design especially since I use my bed for construction everyday and full use of the bed was needed. The under the bed installation kit fit like a glove and the instructions were easy to follow. Working at Coca-Cola for 16 years as a mechanic working on 5th wheels was part of our routine and having the 2 piece full contact jaws was a must and they are about an 1" thick for even better contact with the king pin. I towed a 36 foot toy hauler the grosses at 16000 pounds and it has some weight behind it although it bounced a bit on rough roads it felt very solid and had no rattling. My tow vehicle is 2012 Ram 3500 diesel. If I had to choose again yes I would buy the same hitch and recommend it to you. It will probably take less time to install the second time around but it went good me and a worker installed everything including the wiring harness in about 4 hours. The wiring harness could have been about 5 feet shorter so you don't have so much extra wire, but I routed it the long way around just to take up the extra slack. Only question I would have is why they have you mount it on the bed spacers and not directly on the bed? Hitch has lots of adjustment up and down and forward and back which I will be moving now that I hooked it up to trailer I started in in the middle and now going to move it forward and down to level it more and maybe put a little bit more weight in front of the axle. Good Luck and have fun!!!

After a year its been great and flawless I sold the trailer and bought a bigger trailer and heavier 19000 pounds may need to upgrade the hitch to 22K :. Still like it still a great choice the buy.
Chuck A - 04/20/2016


I love having my pickup bed un obstructed when I am not using my hitch system. I have not used the system yet, but I love how the system interfaces with the gooseneck to 5th wheel so easily.


I'm very disappointed about my shipment! Boxes were ripped open bolts and nuts missing or fell out of boxes during shipment. I'll probably never buy from you guys again! Paid alot of money for nothing!

Thank you for reaching out. I understand that it would be upsetting to receive an order with missing hardware. We can definitely have this taken care of for you and I will have our customer service team reach out to assist
-- Etrailer Expert Jenny N - 08/05/2022


Excellent service great product.

2004 Dodge Ram Pickup

Great product glad I went this route. Took two hours to install, but you will need help holding it up while bolting it on.


Install was simple, between paper instructions and on line videos anyone can assemble and install it themselves. Product appears to be high quality. I have not had a chance to tow with it therefore I cannot provide any feed back on that yet.

2004 Dodge Ram Pickup

Hitch went together super easy. The provided videos helped quite a bit so that when I went to put the hitch in I didn't need the instructions. I think it needs a cap to keep the hitch ball area clean when not in use.

B&W offers two different covers for use with your hitch. When the socket is completely empty, you can use part # BWGNXA1715
B&W Rubber Cover for Empty Turnoverball Socket
. If you want a cover to use when the gooseneck ball is in the stored position you can use part # BWGNXA1710
B&W Rubber Cover for Stowed Turnoverball
-- Etrailer Expert Victoria B - 12/10/2019

2012 Dodge Ram Pickup

I ordered the hitch online sight unseen. I rarely do this but after reading all the reviews on the hitch, and not just on, I didn't think I could go wrong. Almost every review I read about this hitch was between 4-5 star positive. I checked it over pretty thoroughly via pictures and being a certified mechanic I thought how hard could it be. Once I read over the instruction's one night I took on the job the next day. It took me 2hrs to install the hitch with the under bed rails. Very good instructions and installed flawlessly. It looked well built from what I could see. I can say though that I am impressed with's service. Their communication throughout the whole process has been great.

2005 Dodge Ram Pickup

The hitch came in just a few days, UPS delivered it in great condition. I installed it in about an hour and a half with the help of a friend. Installation was straight forward. Watch the online videos and review the I-sheets. It doesn't get much easier. I haven't pulled a trailer with it yet but judging by the design it will work better than expected. I purchased this on the recommendation of 2 friends that use this system with the Companion Fifth Wheel. It is so much easier to remove the Companion than my previous hitch and have a completely unobstructed pick up bed to use. MADE IN THE USA...! What more could you want?

2012 Chevrolet Silverado 3500

I ordered the B&W Companion fifth wheel hitch for my 2012 Dodge 3500 duallly. All pieces arrived before scheduled date, have not installed yet so I'm assuming everything is all there. Very impressed with service, only issue was UPS scattered all boxes on the ground instead of stacking near my delivery point, no fault of etrailer!


I received my 5th wheel package very quickly. It was very easy to install with your instructions that were sent professionally in a envelope. I was dreading the install but it went very easily.
Thank You for a great product. Now we are off to get our new 5th wheel camper, and we hope to enjoy many years of worry free towing.

Thanks Again etrailer


Great product, I ordered the wrong size, should have gotten a taller unit ,can't turn very sharp without hitting the top of the bed rails

2007 Dodge Ram Pickup

Delivered on time. Again etrailer does it great. Install went as planned. The online videos were super. It does take 2 people to get center section in place, after that it’s just putting in the bolts and tightening them properly. Great product. Will pick up my new camper today.


This Baby is really stout. Now I see how they can rate these for so much weight. Super easy to install, but be warned: These parts are VERY HEAVY and help is highly recommended (for the lifting). etrailer came through again. You guys ROCK!!


Great Product. The directions and videos are great and easy to understand. USE BOTH to get full understanding tips for installation. The product is great design and quality. The fit was perfect.
It is however misleading how the wiring kit is discussed but it's NOT included. I wanted a kit with everything. I thought that is what I was getting.

Ram 2500

Fast shipping, good instrustions, and a great product. The B&W hitch went in without a flaw and I could not be happier with it.

2004 Dodge Ram Pickup

Heavy duty product. Paint quality is poor. Surface rust appeared on the edges of the steel plates shortly after install. Simple installation.


Easy installation! Very heavy duty. Just a slight problem with clearance of aftermarket exhaust


We just received the hitch and have not had time to open and inspect it, nor have it installed. I will give more feed back when this is all done.



Works great. Solid hitch and easy to install myself.


Great product, easy to install, great quality fast shipping.


Product works as advertised. Very easy to install. Also when I ordered this product I had it in 3 days, and that was with the free shipping option. Took about 3 hours to install.


Easy install, perfect fit. Well coated to limit corrosion from road salt.

Would buy again.

2011 Ram 2500

Yes it works very well. I am very pleas ed



See what our Experts say about this B and W Fifth Wheel Installation Kit

  • Can 2012 Ram 2500 MegaCab 4x4 with Rambox Safely Tow 5th Wheel Trailer
    The Rambox feature is not an ideal partner for a 5th wheel hitch installation in a truck such as your 2012 Ram 2500 Megacab 4x4. The tool boxes limit side clearance which can cause interference with the pin box as you make turns, and the short bed limits turning clearance between the trailer overhang and the back window of your cab. We have had customers report that with a Sidewinder pin box they were able to tow a fifth wheel trailer with a truck with a Ram Box. Sidewinders move the pivot...
    view full answer...
  • The Difference Between the B and W Gooseneck Hitches for the 2012 Ram 3500
    The main difference between the B and W gooseneck hitch part # BWGNRK1313-5W and the part # BWGNRK1308-5W is the installation kits are designed for different engine configurations. The # BWGNRK1313 is designed for diesel engine models, whereas the # BWGNRK1308 is designed for gasoline engines. There are also some other bed length and cab design application differences between the two that if you wanted to email me back with your bed length, engine configuration, whether you have the Rambox...
    view full answer...
  • Can the B&W Companion From 2006 Dodge Ram be Installed on 1993 Dodge Ram
    If this was previously installed on your 2006 Dodge Ram 2500 it would have used the B&W Turnoverball Underbed Gooseneck Trailer Hitch # BWGNRK1313-5W. This is compatible with the 2003-2013 Dodge Ram Pickup 2500 - 8 Foot Bed. In order to use the B&W Companion on your 1993 Dodge Ram Pickup with 8 foot bed you would need to install the # BWGNRK1300-5W. This is the correct B&W turnoverball underbed gooseneck trailer hitch for the 93 Ram.
    view full answer...
  • Adapting Round Hole in Truck Bed for B&W Companion 5th Wheel Hitch
    The B&W Companion 5th Wheel Trailer Hitch w/ Slider, # BWRVK3400-5W, which you referenced, is compatible with a custom underbed installation kit for B&W Companion 5th Wheel Trailer Hitches, like the custom installation kit # BWGNRK1313-5W. This kit will use the round hole in your truckbed but will add a square post in which the 5th wheel's square-shanked turnover ball fits into. For install details and some product demonstration videos, click the provided links.
    view full answer...
  • Can B & W Fifth Wheel # BWRVK3400-5W be Used on 2012 Ram 3500 Mega Cab Diesel Short Box Rambox
    Although the manufacturers will not recommend using a fifth wheel hitch on a truck with the Rambox since it has not been tested, numerous customers have said that it has worked for them. The B&W Companion 5th Wheel Trailer Hitch with Slider, # BWRVK3400-5W, and Fifth Wheel Installation Kit, # BWGNRK1313-5W, has been confirmed to work with the 2012 Dodge Ram Short Bed Pickup. As mentioned earlier, the manufacturer has not performed any testing to confirm that this system will work with...
    view full answer...
  • Fifth Wheel Hitch Availability for a 2014 Ram 2500 Rambox
    Although the manufacturers will not recommend using a fifth wheel hitch on a truck with the Rambox since it has not been tested, numerous customers have said that it has worked for them. The B&W Companion 5th Wheel Trailer Hitch with Slider, # BWRVK3400-5W, and Fifth Wheel Installation Kit, # BWGNRK1313-5W, has been confirmed to work with the 2014 Dodge Ram Short Bed Pickup. As mentioned earlier, the manufacturer has not performed any testing to confirm that this system will work with...
    view full answer...
  • Best Fifth Wheel Hitch and Rail Kit Recommendation for a 2012 Dodge Ram Long Bed 2500/3500
    I really like the B and W Companion hitches like the part # BWRVK3500-5W. This hitch has a 20k capacity and is one of the most popular hitches on the road because of how well they work. To install this hitch all you would need is the correct rail kit (that also doubles as a gooseneck hitch), part # BWGNRK1313-5W. Basically with this setup you will be getting the nicest fifth wheel hitch setup around that also doubles as a gooseneck hitch. Check out the install and review video I attached...
    view full answer...
  • Dimensions of B&W Companion Sliding Fifth Wheel Hitch That Fits 2003 Dodge Ram 2500
    The B&W Companion # BWRVK3400-5W that fits your 2003 Dodge Ram 2500 measures 34-3/4" wide and 45" deep is 15" from the center of the hitch post to the edge of the hitch on the cab side. To mount the Companion in the 6-1/2' bed of your '03 Ram 2500 you will also need the Custom Underbed Installation Kit for B&W Companion # BWGNRK1313-5W, which doubles as one of the best gooseneck trailer hitches on the market. You are making a very smart choice with the Companion, as it is considered...
    view full answer...
  • 5th Wheel Hitch Recommendation for 2007 Dodge Ram 2500 Short Bed with Turnover Gooseneck
    Since your truck is a short bed that means you need a slider hitch. Since you have a B and W Turnoverball gooseneck hitch part # BWGNRK1313-5W that means the slider you need is the Companion Slider part # BWRVK3400-5W. The factory pin box on your Open Range will work just fine with the Companion, but if you want to upgrade it to a cushioned pin box you would need to get the model brand and number to me. For example, a very popular option is the Lippert 1621.
    view full answer...
  • Recommended 5th Wheel Hitch for Towing a 20K Teton with a 2012 Ram 3500 Short Bed and B&W Gooseneck
    The best 5th wheel hitch for your 2012 Ram 3500 with the Mega Cab and short bed with the B&W Gooseneck Hitch # BWGNRK1313-5W is the Companion # BWRVK3400-5W which is rated right at 20K and will work great with an air-ride pin box. I would typically recommend a setup with a higher weight rating but from what I could find the highest towing capacity for a 2012 Ram 3500 with the Mega Cab and shot box is if you have the 4.10 axle ratio and a GCWR rating of 26,000 lbs. For a 4x2 the rating...
    view full answer...
  • Underbed Installation Kit For B And W Companion 5th Wheel On A 2006 Dodge Ram 3500 Long Bed
    Good question. We have what you need. The Custom Underbed Installation Kit for B&W Companion 5th Wheel Trailer Hitches # BWGNRK1313-5W will fit your 2006 Dodge Ram 3500 with 8 foot bed and let you use the B&W Companion 5th Wheel Trailer Hitch - Dual Jaw - 20,000 lbs # BWRVK3500-5W.
    view full answer...
  • 5th Wheel Hitch And Gooseneck Hitch For A 2005 Dodge Ram 2500 Regular Bed
    For your 2005 Dodge Ram 2500, regular bed, I recommend the B&W Companion 5th Wheel Hitch # BWRVK3400-5W with the installation kit # BWGNRK1313-5W. This 5th wheel hitch has a GTW of 20,000-lbs, and a vertical load limit of 5,000-lbs. When the hitch is removed from the bed, you will have access to a gooseneck ball hole, allowing for you to also use a gooseneck hitch. This hitch utilizes a 2-5/16" ball, and has a maximum towing capacity of 30,000-lbs. You will need to verify with your owner's...
    view full answer...
  • B and W Gooseneck and 5th Wheel Recommendation for a 1996 Chevrolet 3500 Long Bed
    I have a similar B and W Gooseneck hitch that will work on your 1996 Chevy Truck 3500 with a long bed, but the part # BWGNRK1313-5W is not confirmed to fit your vehicle so I cannot recommend it for you. You would want the B and W Gooseneck and Underbed Companion Hitch part # BWGNRK1000-5W. This comes with the gooseneck hitch and ball, for a compatible fifth wheel hitch you would want the B and W Hitch part # BWRVK3500-5W.
    view full answer...
  • Best Hitch Setup for a 2012 Ram 3500 for a Gooseneck and a Fifth Wheel Hitch
    The B and W Companion hitch like part # BWRVK3500 would be the best option for you. To install this hitch you will need the correct rail kit though, (this doubles as the gooseneck hitch), for that you would want the part # BWGNRK1313-5W if you have a diesel engine or part # BWGNRK1308-5W if you have a gas engine. The spray-in bed liner you have in the bed of your truck will work well with the Companion hitch. The hitch won't damage the liner, nor would the liner need to get removed.
    view full answer...
  • Recommendation for a 2009 Dodge Ram for a Gooseneck Hitch and 5th Wheel Hitch
    The Custom Underbed Installation Kit # BWGNRK1313-5W and the B&W Turnoverball Underbed Gooseneck Trailer Hitch w/ Custom Installation Kit # BWGNRK1313 actually are the same thing. Either would be an excellent choice for you to provide you with a gooseneck hitch plus the ability to install a B&W Companion Gooseneck-to-5th-Wheel Trailer Hitch Adapter # BWRVK3500 if you have a long bed or a B&W Companion Slider Gooseneck-to-5th-Wheel Trailer Hitch Adapter # BWRVK3400 if you have a short bed. Since...
    view full answer...
  • Is There Any Difference Between B&W BWGNRK1313-5W, and the BWGNRK1313 Installation Kits
    There is no difference between the B&W Underbed Trailer Hitch part # BWGNRK1313 and part # BWGNRK1313-5W. The reason they are listed separately is because we want to make them easy to find for both gooseneck and fifth wheel searches. These are both capable of being used as a gooseneck hitch and also can be used with the Companion fifth wheel hitches. With your 2007 Ram 2500 and an 8 ft bed I recommend going with the B&W Companion Gooseneck-to-5th-Wheel Trailer Hitch Adapter, part # BWRVK3500....
    view full answer...
  • Fifth Wheel and Gooseneck Hitch Setup Recommendation for 2007 Dodge Ram 2500
    The perfect solution for you is the B and W Companion Hitch and Turnoverball Gooseneck Hitch as it gives you a gooseneck hitch that can easily have a fifth wheel hitch mounted into it. For the rail kit/gooseneck you need the part # BWGNRK1313-5W and then for a hitch you would want the part # BWRVK3400.
    view full answer...
  • Correct B&W Turnoverball Gooseneck Hitch for 2007 Dodge Ram 2500 Diesel Short Bed
    The B&W Turnoverball Gooseneck Hitch # BWGNRK1313-5W that you referenced is indeed the correct model for your 2007 Dodge Ram 2500 Diesel. The custom brackets included with this assembly will line up to existing holes in the truck's frame rails so you don't have to drill into them during installation. I have attached an installation video below that you can use for reference, along with the written instructions manual. The Andersen Ultimate 5th Wheel Connection does feature an offset...
    view full answer...
  • 5th Wheel Hitch Recommendation for 2007 Dodge Ram 2500 Long Bed
    The B and W Companion fifth wheel hitch part # BWRVK3500 is the hitch I would recommend for your 2007 Dodge Ram 2500 long bed as it is widely considered to be the best fifth wheel hitch out there. It's very well-made, quiet, reliable, and also made in the USA. Also it has the advantage of using a rail kit that leaves a minimal foot print in your truck bed so you have a mostly open bed when not towing. Then for a rail kit you'd only need the part # BWGNRK1313 that you referenced.
    view full answer...
  • B and W Fifth Wheel Installation Kit and Gooseneck Trailer Hitch for a 2011 Ram 3500 Mega Cab Diesel
    B and W installation kit and gooseneck trailer hitch # BWGNRK1313-5W will fit your 2011 Ram 3500 Mega Cab diesel. The kit was actually designed to fit diesel models. I have linked a video review of the kit and the instructions for you to view. If you need a compatible 5th wheel hitch to go with the install kit and gooseneck then you would need B and W Companion hitch # BWRVK3500-5W. To an in-bed 5th wheel/gooseneck trailer wiring, you can use Hopkins wiring harness # 41157. It plugs in...
    view full answer...
  • Recommended Fifth Wheel and Gooseneck Hitches in 2011 Ram 2500 Diesel
    Since you said you'd like to be able to tow a gooseneck trailer in addition to the fifth wheel trailer I suggest the B&W Companion. The fifth wheel hitch # BWRVK3400-5W is a sliding hitch that will help you make sharp turns without hitting the truck with the trailer. To install the hitch in your 2011 Ram 2500 you'll need to use # BWGNRK1313-5W which is an underbed gooseneck hitch for the fifth wheel hitch to mount into. So you'll have the ability to tow both types of trailers. If you'd...
    view full answer...
  • B and W 5th Wheel Hitch Compatibility with 2005 Dodge Ram 2500 Diesel
    If your 2006 Dodge Ram 2500 diesel has an 8-foot bed you will use B and W 5th wheel # BWRVK3500-5W along with Installation Kit # BWGNRK1313-5W. This hitch carries a 20K rating. If your Ram has the 6-foot bed with Mega Cab you will instead use hitch # BWRVK3400-5W and installation kit # BWGNRK1308-5W. If you have the 6-foot bed without Mega Cab you will use the same hitch but you'll need instead install kit # BWGNRK1313-5W. I have linked an install video for your reference.
    view full answer...
  • Correct B&W Companion Fifth Wheel Hitch for 2012 Dodge Ram 3500
    The correct B&W Companion for your 2012 Dodge Ram 3500 with the B&W Turnoverball gooseneck already installed will depend on if you have a 6-1/2 foot bed or an 8 foot bed because you will need either a sliding hitch if you have a short bed or a fixed hitch for a long bed. For a 6-1/2 foot bed you need the B&W Companion 5th Wheel Trailer Hitch w/ Slider # BWRVK3400-5W. For an 8 foot bed you need the B&W Companion 5th Wheel Trailer Hitch # BWRVK3500-5W. By non-factory B&W gooseneck I do...
    view full answer...
  • Best 5th Wheel Hitch with Compatible Underbed Install Kits for 2003 Silverado 2500 and 2012 Ram 2500
    The Reese Elite and the Reese Signature Series Fifth Wheel Hitches both only mount to underbed kits designed specifically for their respective hitch. Unfortunately there aren't any adapter kits or underbed systems available for your 2003 Chevy Silverado with the 8ft bed, so there isn't going to be a way to use those hitches on that vehicle. For this reason I think the best solution is using a different hitch that provides you with the ability to switch trucks and allow you to use underbed...
    view full answer...

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