This virtually indestructible cover solid for strobe unit alarms is designed to stop vandalism and accidental damage for flush mounted units and is NEMA 4X Rated. Molded of clear, thick, UV-stabilized polycarbonate material, backed by a lifetime guarantee against breakage in normal use. Unit comes with a solid 4 in. enclosed back box for wash down areas, double-gang outlet box and gaskets to help seal the unit.