Leviton 5469-C 20 Amp, 250 Volt, Connector, Straight Blade, Industrial Grade, Grounding, Black-White Super Tough Nylon Body Resists Damage From Severe Impact, Abrasion and Chemicals Transparent Wiring Chambers provide a means of visual inspection of conductors and terminals Wiring Module Keyed to Body for Easy Assembly and a Tight Fit Dead Front Solid Containment Barrier Prevents Accidental Contact with Internal Parts Wire clamps bundle stranded wire maximizing wire/clamp surface contact