Dual rated aluminum splicer/reducer made from high-strength aluminum alloy, suitable for use with either copper or aluminum conductors. Electro-tin plating provides low contact resistance. Chamfered wire entry for easy installation. Rounded bottoms facilitates taping. Large screw diameters insure all wire strands are held securely, solid center barrier prevents dissimilar metals from coming into contact. UL (Underwriter's Laboratories) listed, CSA (Canadian Standards Association) certified.