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Rubber Grommet for 4" Round Trailer Lights - PVC

Rubber Grommet for 4" Round Trailer Lights - PVC

Item # A45GB
Our Price: $5.80
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Shipping Weight: 0.21 lbs
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Optronics Mounting Hardware Accessories and Parts - A45GB
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This black PVC grommet allows you to flush mount your Optronics 4" round trailer light. Shock mount protection extends the life of the lamp. Recessed mount. Durable plastic construction. 1-800-940-8924 to order Optronics accessories and parts part number A45GB or order online at Free expert support on all Optronics products. Great prices and Fastest Shipping for Rubber Grommet for 4" Round Trailer Lights - PVC. Accessories and Parts reviews from real customers.
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  • Reviews (168)
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Optronics Accessories and Parts - A45GB

  • Trailer Lights
  • Mounting Hardware
  • Grommet
  • Round
  • Optronics
  • 4 Inch Diameter

This black PVC grommet allows you to flush mount your Optronics 4" round trailer light. Shock mount protection extends the life of the lamp. Recessed mount. Durable plastic construction.


  • Grommet allows you to flush mount your Optronics 4" round trailer light
    • Designed to fit Optronics 45 Series lights (sold separately)
  • Shock mount design cushions light against vibration and jolting
  • Open back provides easy access when wiring
  • Light snaps into grommet for a finished look
  • Durable PVC construction
  • Recessed mount installation - hardware not included
    • Requires 4-1/2" cutout


  • Outer diameter: 5-3/8"
  • Mounting depth: 1-1/16"

Optronics PVC grommet for 4 Inch Round Flush Mount Lights Diagram

Manufacturer Cross-Reference

Grommet will work as an exact replacement for:

  • Uni Bond GR4000
  • Wesbar 224088
  • Truck Lite 40700
  • Grote 91740
  • Peterson 426-18
  • Bargman 40-01-020

A45GB Optronics Rubber Grommet for 4" Round Sealed Trailer Tail Lights - Recessed Mount

Alternate part number: A-45GB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Rubber Grommet for 4" Round Trailer Lights - PVC - A45GB

Average Customer Rating:  4.7 out of 5 stars   (168 Customer Reviews)

This black PVC grommet allows you to flush mount your Optronics 4" round trailer light. Shock mount protection extends the life of the lamp. Recessed mount. Durable plastic construction.


These are good grommets for the price. I've purchased a few over the years and they have never failed. I've only replaced them because they got some over spray from paint on them or something like that and it's cheaper and easier just to buy another pair and have them look brand new again. I use them on a Jeep built for rock crawling and I've attached a picture of one of them on the Jeep but this is an old set and not the best picture but you get the idea. They hold up well to abuse.

Still working well and holding up to the punishment I put them through.
Matt F - 07/19/2017


The grommets did not fit into my original openings. I had to use a die-grinder to enlarge the holes by 1/8” all the way around. Once complete, they fit pretty good.


I ordered the STL101RB Trailer Tail Light - Stop, Tail, Turn, Backup - LED to replace the standard tail lights on my Yamah Drive G19 golf cart. They replaced to stock ones perfectly as a neat way to add a backup lights for a custom feature. The backups led are actuated by the reverse switch on the dash.

It should be noted that the ground terminal on the two wire pigtail connection is not wired internally to the backup LEDs. They rely on the ground supplied by the three wire pigtail. Not a big deal, but worth noting. It throws a curve when bench testing.

These lamps add a nice custom touch!


Works good very difficult to install


The amber led lights I received were great and I installed them in the front of my 2002 Pontiac Firebird cuz I clipped another deer and ran over a raccoon in the same night and they took out my front lights again. So, rather than try to purchase an original set of turn signal and fog light assemblies along with the expensive bulbs, I converted it over to led and it is a great upgrade for an older car. The problem is that the three color coded wires came with no directions that told me which wire was ground, park, or turn. I had to figure it out as the color codes are different on my car. I would send a pic, but it is on my cellphone.


Perfect for what I needed - seals for computer cable access in a desk...timely delivery...excellent!


Very pleased now other drivers can see my tail lights. Better yet turn signals & stop lights are bright .I would recommend these lights to any drivers that want to be safe on the highways

Very well I should have ordered these years ago.
Roger R - 05/03/2021


Items arrived as described. Good quality, price and fast delivery made this purchase an overall great deal. The lights, cables and grommets I haven’t test them, waiting for my truck replacement bumper to arrive in September and have the body shop install them for me. I will update my review, but for now I recommend this products and the seller.

After a year using this product function-ability still performing as described. I recommend this product and seller.
nyfb4u2 - 08/21/2017


Hi guys,
I'm usually the one answering
These guys are great! My client emailed the link & told me to order these for our horse trailers.
They've held up, to the point, we're not even close to needing to replace them.
We haul quite a bit. These lights have been tried & true, day & night.
When you're hauling a lot of livestock, you want people that have no clue what that entails, to see your lights well before they get near your livestock ; these lights do the job perfect!
We've outfitted 3 separate trailers with this company. We restored wires, lights, & pretty much everything along those lines ;from a 2 horse, to a large stock, & a gooseneck. All the parts come quickly, are all there, & work & fit great. What more can you ask for?!


I’ve used etrailer on multiple occasions and have been completely satisfied with their service and professionalism .

Superb. I thank you for the service and professionalism that the company exhibited.
Mark - 04/19/2020


I have been looking for a long time to find a replacement for this light.
I could buy others, or kits etc, but I wanted this same light.
I contacted the company and explained what I needed.
They had it in stock as well as sealed light, the wires and connections.
It was delivered Very promptly, within a matter of days.
Excellent service.

Actually, It came out of the rubber gasket when we put the boat into the water====Never found it!
Trailer l - 05/29/2016


I ordered a set of tail lights for my boat trailer and they shipped fast. The customer service is really great too. The product is high quality and I'm very happy with it. The only issue I had with is they charge far too much for shipping and they only use UPS. So people like me who have a frequent shipper contract with other freight and delivery companies can't get it shipped at a reasonable cost. It is unreasonable to me to pay just as much for shipping as the product cost. Etrailer if you are listening, please ship small things in USPS flat rate boxes and allow customers to use their frequent shipping agreements with other delivery services.


The rubber grommets are fine just a little tight for my existing lights to fit in. I had to use some glass cleaner to get them to even have a chance of going in and a lot of brute force. Now I'm not sure if it is because they weren't matched with the LED's I already have or maybe the rubber is not so "rubbery" I've had issues with other "rubber" things. All in all they replaced the cracking existing grommets and they look good.
The 2" marker lights were a waste of money not because there are issues, but because I needed 2 1/2" ones so these don't fit. I ordered wrong, but the quality of the lights look good.


The product arrived quickly and was just as described. My trailer is older and I was having trouble finding replacements for the tail lights. Their sales rep, Cathy T., was knowledgeable and friendly. The next time I need parts for my horse trailer, I will go directly to etrailer.


Here's the pic of my finished project. Thanks for ur help.


Lights they recommend use a grommet. Very hard to get light in grommet in bracket. I will probably be returning on light and grommet. I've tried everything short of using hammer to get light in grommet. Would have thought bolt/screw on light would have been recommended


They worked well once I got them installed. I had to relieve the hole in the back fiberglass cap, which took some trial and error.


Perfect fit!


etrailer as always has what I need, ships fast, and product is "as advertised"!
A pleasure to talk to the tech's when I have questions and even go as far as calling manufacturer to verify equipment selections.
Keep up the GREAT work.


Excellent service and attention to detail. I would highly recommend purchasing from etrailer. Prices are great and they have a wide selection of information that helps with the purchase decision. Very impressed.


My 96 Chevy ramp truck, (car hauler) has 12 total lights mounted in these rubber rings and several them were cracked and aged. These look and fit well. I'd buy them again if I needed them.


Good solid grommet that holds up well. has great customer service and will take care of you.


Fast shipping


Communication with etrailer has been really good.This item was back ordered and they let us know immediately.

The grommets fit well into the holes and the lights pop in snuggly.


fast delivery, looks good

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