Polycarbonate Prismatic Light Lens 23.75 " x 2.75" Lexan 903173U is a Lexan polycarbonate sheet with K12 prismatic texture on one side and a proprietary UV-resistant surface treatment on the polished side that protects it from weathering. Lexan 903173U is backed by a 10 year limited warranty against loss of light transmission and breakage. Providing long lasting light transmission over a wide range of weather conditions and environments, Lexan sheet improves service life and reduces life-cycle material costs. The K12 prismatic texture allows the sheet to offer excellent efficiency in light transmission. Lexan sheet is well suited for all types of vertical glazing and overhead applications such as skylights, covered walkways and barrel vaults.