Rocketsplice Insulated Splicer-Recducer Connector, Mechanical connection, Dual Rated, Aluminum material, Tin plated connector, UL 486A/B Listed, C22.2 No. 65-03, Copper/Aluminum Primary Conductor 250 kcmil - 6 Str, Copper/Aluminum Secondary Conductor 250 kcmil - 6 Str, 2 conductors, Plastisol insulation, Drive Type Main 5/16 Internal Hex, rated for 600 V, primary color Clear, 1 poles,