Used to provide additional capacity needed for NEC box fill requirements. Die cast aluminum construction. 6 threaded 1/2" outlets. Installation hardware gasket and 1/2" closure plugs included. Ground screw is provided. Internal threads andhubs comply with NEMA requirements. Hubs accept all threaded 1/2" fittings and threaded conduit. 5-1/4" length x 3-1/2"width x 1-1/2" depth. UL Listed. NEMA 3R Rated.