i dont have that. mine is just the light and a ring inside the housing that sits on the truck. no ring around it.

 

mine was bowed out in the center and even if i were to get a new gasket it wouldn't have sealed. i put a layer of rtv on it and let it dry then re-installed the light. i didn't notice a leak for the few weeks that went by before i got an led third brake light (that sits flush all the way across).

 

damn so many decisions.