Triple drive head screws, NEMA Configuration number and rating molded on device for easy identification, Rubber body is dirt and moisture resistant, Deep slotted, backed out terminal screws draw backwire clamps securely for maximum conductivity, Husk and module keyed for easy alignment during wiring, Built - in cord grip adjusts automatically for use with No. 18-3 through No. 12-3 cords, Designed to stand up to rough use, No internal metal parts exposed, Elastometric husk provides added protection against dirt and moisture entry in to the back wire port, Designed to operate in the widest possible temperature range, Meets NEMA requirements, UL Listed, CSA Certified, NOM Certified. Diameter:0.245" to 0.655" cord Type: 2 pole, 3 wire grounding Color: Black Amperage: 15A Voltage: 125V.