Leviton 000-515CR-000 15 Amp Rubber Grounding Plug, Black Rubber back design for sure grip and protection against dirt and moisture entry Triple drive head screws for fast installation Cord grip adjust: #18-3, #16-3, #14-3 and #12-3 cords Designed to operate in the widest possible temperature ranges UL Listed, CSA Certified, NOM Certified