ILSCO ClearChoice Splicer/Reducer, Type SPA Dual Rated, Aluminum/Copper Conductor, 250 to 750 kcmil Conductor, 4 Screws, 2000 V AC, Specifications: 3/8 in Hex, 15/16 in Dia Screw, 90 deg C, Aluminum, Electro-Plated Tin, 5-7/16 in L x 1-3/8 in W x 1-3/4 in H Dimensions