Leviton 5362-IGG 20-Amp, 125 Volt, Industrial Series Heavy Duty Specification Grade, Duplex Receptacle, Straight Blade, Isolated Ground, Gray Impact-Resistant Thermoplastic Nylon Cover and Body Smooth Face Does not Collect Dirt Single-Piece Brass Mounting Strap on Extra Heavy-Duty Devices, Multi-Piece Steel Strap on Heavy-Duty Devices Large, Triple-Wipe, Brass "T" Contacts for Superior Contact and Conductivity Exclusive V-Shaped, Serrated Back-Wiring Clamps for Superior Contact and Conductivity