Weatherproof snap back protective cover to fit all compatible brands of 400A cam type receptacles. Standard frame dimension allows retrofit existing application easily. The gasket offers a NEMA 3R rated environmental seal that provides a protection against falling rain, dust or frost, and also provides a safe way to cover exposed metal, while keeping the weather out when the receptacle is not used. Kupo Dust Cover is made from a high impact resistant, flame retardant ABS material and corrosion resistant stainless steel hardware. Five colors available for phase identification.