UNILETS Outlet Box, Number Of Outlet: 1, Material: Malleable Iron, Size: 1 IN, Cable Entry: (1) 1 IN GRE Hub, Cubic Capacity: 18 CU-IN, Knockouts: No, Cover Opening: 3.38 IN, Form Number: 1, Height: 3-3/4 IN, Width: 3-3/4 IN, Depth: 2-1/4 IN, Nema Rating: NEMA 3, 4, Finish: Triple-Coat (Zinc Electroplate, Chromate And Epoxy Powder Coat), Standard: Class 1, Zone 1 And 2 IIA And IIB, UL File Number E10444, CSA C22.2 No. 25, C22.2 No. 30, CSA 013017 Certified, Class I, Division 1 And 2, Groups B, C, D Class II, Division 1 And 2, Groups E, F, G Class III, For Use With Threaded Metal Conduit