High-impact, galvanized steel frame, felt-padded 0.020 gauge aluminum louvers for ultra-quiet operation. Louvers open automatically when ventilator is operating. When ventilator turns off, louvers close to keep out insects, rain, and dust. Pre-assembled for easy installation. No. CX2121AM: Material: Galvanized Steel, Aluminum Louvers, Size: 22 In. W x 23 In. H x 3 In. D, Type: Automatic, Color: Mill, Pkg Qty: 1, Package Type: Box
