Leviton 76W74-C 20A-125/250V, NEMA L14-20, 3P, 4W, Industrial Grade, Grounding, Wetguard, Locking Connector for Single Inlet, Yellow Clear back cover on wiring module for easy inspection of wired terminals High-performance elastomeric parts resist water and most acids, alkalis, grease, oil, and solvents - offers UV stability and resists fungal growth Innovative strain relief system and compression nut provide a watertight seal and prevent cord slippage for multiple cord diameters Heavy-duty, one-piece contacts for maximum conductivity electrical performance Electro less nickel-coated brass blades, contacts, wiring screws and wiring clamps resist corrosion