Leviton C2623 30 Amp, 250 Volt, NEMA L6-30R, 2P, 3W, Locking Connector, Industrial Grade, Grounding, Black-White Super tough nylon body resists damage from severe impact, abrasion and chemicals NEMA and Non-NEMA configurations available Solid brass blades and contacts feature improved conductivity, low resistance, low heat, and long life Internal wiring chambers isolate individual conductors to prevent flashover, arcing, and stray strands of wire Part of Leviton's award winning residential system