1'x1' White Plastic Antique Diffuser
1'x1' White Plastic Antique Air Diffusers for residential or light commercial applications. Rough opening in the ceiling should be 9-1/4" round. OD of square faceplate: 11-1/4" x 11-1/4" Included is a built-in Air Damper to restrict air flow when desired. Zip Tie Included. Used for a 4",6" or 8" duct.