Replacement Snap Ring for 4-1/2" Round, Flange Mount Trailer Tail Lights
A snap-in lens ring for use with 4" and 4-1/2" round flange-mount lights. This ring is made of 1/8" thick metal and is 5-1/8" in diameter without any tension on the ring. The ring snaps into place around the lens to lock it into the housing.
Manufacturer Specifications
Snap-in bracket for mounting 4-1/2" round lights.

A-40SRB Snap Ring for ST40 Series by Optronics, Inc.