Appleton® UNILETS® Conduit Outlet Box, Dust-Ignitionproof Explosionproof Raintight, Series: GRJ, 3/4 in, 2.13 in Cover Opening Size, 7.3 cu-in, For Use With: Threaded Metallic Conduit System, Malleable Iron, Triple Coated, 2.88 in H x 2.88 in W x 2.06 in D