Eaton 35MM commercial meter stack, K-base bolt-on socket, 400A, Copper, Bus:1200A, Lever bypass, NEMA 3R, Depends on selected MCB, 5-jaw, Sockets:1, 3-phase in, 1-phase out, A-B, 400A, K-frame included, Ringless, Socket:400A, 120/240 Vac