Burndy Dual-rated splicer reducer features aluminum construction with galvanic corrosion-resistant tin-plated finish. It measures 4-3/32-Inch x 1-Inch x 1-3/32-Inch. Reducer accommodates 6 - 4/0-AWG aluminum conductor and 4 - 4/0-AWG solid as well as 6-AWG - 250-KCMIL stranded copper conductor. It has 5/16-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.