Industrial Specification Grade duplex outlet featuring a nylon face and base. Back and side wired, 4 large-head brass spring loaded terminal screws with steel wire connectors and 8 back wiring holes for maximum wiring convenience. Wire containment rib, groundamatic self-grounding strap locked into base, green grounding screw. Meets all requirements of latest Fed Spec. WC-596F. 15 amps/125 volts, NEMA (National Electrical Manufacturer's Association) 5-15R. UL (Underwriter's Laboratories) listed. Limited 10-year warranty.