Lev-Lok® Extra heavy-duty hospital grade modular duplex receptacle. Isolated ground, tamper-resistant. 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. 12 AWG THHN wire leads, 6 inch length on MSTWL series wiring modules. Grounding clip permanently secured to strap for easy, simple and secure installation. Receptacle face includes threaded brass bushing for reliable, secure wallplate attachment. Wiring module locks and latches to the receptacle body providing double the connection security. Receptacle to be installed only with Leviton MSTWL series wiring modules. MSTWL wiring module shipped separately with protective cover and factory-installed circuit ID label. Backed by a limited 10-year warranty.