This item is a 3 Poles, 6 Load Connections, 310 Amp, 350 kcmil-6 AWG (Cu/Al) Primary, 4-12 AWG (Al), 4-14 AWG (Cu) Secondary, Thermoplastic Power Distribution Block 600 Volts AC/DC, 1 Primary Connection, 5.2" Long x 3.32" Deep x 4" High manufactured by Eaton.