KUP-L-Tap Insulation Piercing Connector, Mechanical connection, Dual Rated, Copper material, Tin plated connector, UL 486A/B Listed, C22.2 No. 65-03, Copper/Aluminum Primary Conductor 500 kcmil - 250 kcmil, Copper/Aluminum Secondary Conductor 250 kcmil - 4 Str, 2 conductors, Nylon insulation, Drive Type Main 5/8-11/16 External Hex, rated for 600 V, primary color Black, 1 poles,