The Hoffman Fiberglass Series NEMA 4X Enclosures are constructed from compression-molded, fiberglass-reinforced polyester. These enclosures offer excellent impact resistance, thermal insulation, and corrosion resistance. Smooth-surfaced, lightweight, nonconductive, and flame-retardant, they can be easily drilled. The gray color is molded in. This type uses a stainless steel hinge and are UL listed, File #E64358.