Hubbell 5400-5 Extension Box Adapter, 1 Gang, 9.5 Cu-in, 5-1/4 in L X 3-1/2 in W X 1-1/2 in D, 1/2 in. NPT State of the art powder coat finish provides maximum weather ability and scratch resistance Rugged die cast aluminum construction Internal hub threads comply with NEMA requirements and will accept all threaded fittings and threaded conduit Reinforced connector outlets Three 1/2 In closure plugs, installation hardware, gasket, and ground screw included