Material: Polycarbonate Clear Prismatic - Vandal Resistant - Crown Top with Prismatic finish interior and exterior_x000D_\n_x000D_\nThese 12x12 light diffuser polycarbonate security Lenses are injection molded lenses are manufactured using clear polycarbonate material. The polycarbonate version provides protection of the light source against abuse, such as severe impact and vandalism. The service life of acrylic refractors is virtually unlimited when used within the recommended temperature limit._x000D_\n_x000D_\n The ceiling light cover 12 x 12 provides the ultimate light control with maximum efficiency._x000D_\n These components are capable of being used with HID, incandescent, CFL and various other fluorescent lamps depending on the luminaire._x000D_\n These fluorescent vandal resistant replacement cover Security Lenses are suitable for interior and exterior applications._x000D_\n Used with LED, HID, incandescent, CFL and various other fluorescent lamps depending on the luminaire_x000D_\n Before final installation of Regulators dissipate static n parts by spraying with de-staticized air or by wiping with a clean, damp rag. This will help minimize dust build up._x000D_\n_x000D_\nSize OD: 12" wide ; Length: 12"; 5 1/2 " High;_x000D_\n_x000D_\nAlso available in other SIZES. Our Replacement fits perfectly for Commercial Lens. x000D_\n_x000D_\n _x000D_\n_x000D_\nThis is not what you need...Look at other replacement lighting covers for fluorescent lights on Buy Now! _x000D_\n_x000D_\nOR _x000D_\n_x000D_\nWe do Custom Orders, Wholesale, Residential, Commercial and More for all style of ceiling light diffuser replacement!!!