1'x1' white plastic diffuser with a 3-way airflow.
Plastic air diffusers and grilles for residential or light commercial applications. Rough opening in the ceiling should be 9-1/4" round. OD of square:11-1/4" x 11-1/4". Included is a built-in Air Damper to restrict air flow when desired. Used for a 4",6" or 8" duct.