Door Louver,22 1/4 in H,22 1/4 in W 20J942. Door Louver, Material Steel, Opening Height 24 In., Opening Width 24 In. NATIONAL GUARD L-700-RX-24x24. NGP door louvers are made of 18-ga. cold-rolled steel.
Very Sturdy and well built. Easy to install, good air flow and is built so as to prevent any see through. Screws for installation were supplied and this is a very good product