Sigmas weatherproof one-gang 15/20 Amp round receptacle covers provide protection to a single 15/20 Amp receptacle mounted vertically in a one-gang weatherproof box. Their rugged, die-cast construction features a self-closing lid which prevents moisture penetration when receptacles are not in use and compliment weatherproof one-gang boxes. Receptacle covers are powder coated for corrosion resistance and include hardware and gasket.