Tapping Power Distribution Block - Color Grey - 1 Wire: Cu/Al 4/0 - #4 AWG, 2 Wires: Cu Only #2 - #6 Awg, 3 Wires: Cu Only #6 Awg - Voltage Rating 600 Volts Max - Max Current AL/CU 180/230A - Overall Dimensions 1.7"W x 3.4"H x 1.9"D