ILSCO Split Bolt, Mechanical connection, Copper material, Tin plated connector, UL 486A/B Listed, C22.2 No. 65, C22.2 No. 188, Copper Primary Conductor 250 kcmil - 4 Str, Copper Secondary Conductor 250 kcmil - 4 Str, 1 conductors, 1 ports/wireways, Drive Type Main 1, 1-5/16 External Hex, rated for 35 kV, primary color Silver, Conductor range for solid equal run & tap 4/0 Sol - 3 Sol, Conductor range for stranded equal run & tap 4/0 Sol - 3 Sol, 1 poles,