Receptacle With Aja Mounting Box | 4 in Octagon Back Plate With No Stud; (3) 1/2 in Knockouts, (2) 3/4 in Knockouts | Dimmable: Non-Dimmable ; Operating Temp: -20c (-4f) to a Maximum of +45c (+113f) ; Nsf Approved: Yes - Approved | For Reverse Service (Generator Applications)Furbay Electric Supp