Burndy Dual-rated splicer reducer features aluminum construction with galvanic corrosion-resistant tin-plated finish. It measures 4-25/32-Inch x 1-1/4-Inch x 1-3/8-Inch. Reducer accommodates 3/0-AWG - 500-KCMIL aluminum conductor and 3/0 - 4/0-AWG solid as well as 3/0-AWG - 500-KCMIL stranded copper conductor. It has 3/8-Inch Hex stud. Large screw diameters ensure greater surface contact with wires for maximum pullout force. Splicer reducer is UL listed, CSA certified and RoHS compliant.