Appleton® UNILETS™ Explosionproof Conduit Outlet Box, T-Style Dust-Ignitionproof, Series: GUT, 1 in Size, 3.38 in Cover Opening, 19 cu-in Capacity, For Use With: Threaded Metal Conduit System, Malleable Iron, Triple Coated Finish, 4.28 in H x 4.28 in W x 2.25 in D Dimensions