The Rockwood 609 DuraFlex gray rubber door silencer helps quiet a wood door when it swings open. The silencer measures 3/8 by 3/4 , and mounts into a hole in the door frame. It meets American National Standards Institute ANSI A156.16: L03021 specifications. Rockwood Manufacturing Company manufactures door hardware. The company, founded in 1946, is headquartered in Rockwood, PA.
