Lamps | Dimmable: Non-Dimmable ; Operating Temp: -20c (-4f) to a Maximum of +45c (+113f) ; Nsf Approved: Yes - Approved | These Heavy Duty Cast Hub Device Boxes Accommodate Standard Wiring Devices Such as Switches and Receptacles, Serve as Pull Boxes for Conductors, Provide Access for Splicing and Maintenance, or Allow Connections for Branch Conduit Runs; Rugged and Corrosion | Use Through Knockout to Connect Box to Conduit Coupling; Use With a Locknut to Connect Two Boxes Side by Side or Back to Back; Use With a Locknut to Connect Fixture Housings in Continuous Runs; Rigid Conduit Threads (Nps)Furbay Electric Supp