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 350 kcmil - 4/0 Str, Copper/Aluminum Secondary Conductor 10 Sol and 4/0 Str - 10 Str, 2 conductors, Nylon insulation, Drive Type Main 5/8 External Hex, rated for 300 V (480 Grounded Y System), primary color Black, 1 poles,