Stanley 80-4297 Solid Brass Apartment Door Knocker 6-1/4 Inch Height Adds the finishing decorative touch to any door up to 36 by 80 inches. Furnished with machine screws and finish washers for "thru-the-door" installation Includes installation template and screws for doors up to 1-3/4 inch thick. Polished brass finish has limited lifetime warranty Base material: Solid brass