The Vapor Tite fixture is intended for specific applications that are wet or controlled such as food/beverage processing, pharmaceuticals, or other non hazardous environments. These curled edge vapor-tite diffusers are manufactured with the highest grade material for increased flexibility.
The size was perfect, covered the hole in the ceiling just like I wanted.
Under Cabinet Light Lens 2.8125in. wide x .9375in. high (4113P-320RW)
I had this installed as an outside cover over the crawl space vent. The metal vent always rusted and looked terrible. I wanted a plastic cover that would not rust. It's been on for one hour, and looks great.