Lev-Lok® Extra heavy-duty hospital grade modular receptacle. NEMA type 5-15R. Constructed with impact-resistant thermoplastic nylon cover and body. Smooth face prevents dirt from collecting. Four corner latches securely fasten the receptacle's face to the body. Large triple-wipe, brass T-line contacts for superior contact and conductivity. No.12 AWG THHN wire leads, 6 inch length on MSTWL series wiring modules. For isolated ground versions, device strap is zinc plated steel and isolated ground system is brass. Grounding clip permanently secured to strap for easy, simple and secure installation. Wiring module locks and latches to the receptacle body providing double the connection security. Receptacle to be installed only with MSTWL series wiring modules.