Conduit Outlet Box, Number Of Outlets: 3, Material: Malleable Iron, Size: 3/4", Cable Entry: (3) 3/4 In Grt Hub, Cubic Capacity: 18" Cubic, No Knockouts, Cover Opening: 3.38", Form Number: 1, Height: 3-3/4", Width: 3-3/4", Depth: 2- 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.