Door Louver, Material Steel, Opening Height 18 In., Opening Width 18 In., Window Height 28 In., Window Width 22 In. The NGP "no vision" door louver is self attaching when installed in metal or wood doors. Made from 18-ga. cold-rolled steel frame, the louver features mitered and welded corners with welded reinforcing clips at the corners. 24-ga. steel blades have hemmed edges. The inverted "V" design includes countersunk mounting screw holes. Gray primer powder-coat finish.
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