P5 is a low-brightness louver of choice when a controlled luminance is required. The 3/4" x 3/4" cell size is slightly larger than standard egg crate, # 4722CH, but smaller than P2 Egg Crate which is 1.5" x 1.5" cell size, # 4724-P2. P5 Egg Crate is 3/8" thick with a flat back design that affords efficiencies equal to those of lenses while maintaining 99% of it's distribution in the 0-60 degree zone. The largest sheet we stock is 23-11/16" x 47-11/16". Made of polystyrene and spray-coated with a chrome metallic coating.