Tamper and weather resistant specification grade, back and side wiring. -4 to 158° F temperature rating. Withstands 2000 volts per UL498. Body is thermoplastic nylon, the strap and terminal clamps are nickel plated steel. The contacts are a brass alloy. UL Listed to UL498, UL Certified to CSA C22.2, no. 42, Meets all UL943 (GFCI) and UL498 (Receptacles) requirements, and NOM/ANSI Certified. Meets UL 94 flammability requirements; V2 rated. -4 to 158° F temperature rating. Withstands 2000 volts per UL498. TR and WR designations provide visual identification. UL, cULus Listed.