Door Louver, Material Steel, Opening Height 18 In., Opening Width 24 In. NGP door louvers are made of 18-ga. cold-rolled steel. No-vision louvers improve airflow in rooms when doors are closed. Welded reinforcing clips at the corners help keep louvers in place and improve vandalism resistance. Self-attaching door louvers fit 1-3/4"-thick doors only. Includes mounting fasteners.
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