Ventamatic Cool Attic Galvanized Steel, Aluminum Louvers 22 In. W x 22 In. H x 3 In. D Automatic Automatic Gable Shutter

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.