Curved Face Adjustable Vane Stylish 4 way register for ceiling supply air. Aluminum construction. Vanes are adjustable left, right, up and down. Opposable blade damper opens and closes with screwdriver for precise airflow control. Color-White. Comes with mounting screws. NOTE - Registers are measured by the hole they are meant to cover. For instance, if you have a ceiling opening that measures 8-1/4" x 8-1/4" you would order an 8x8 register. The back part of the register will be undersized to fit about 7-5/8" x 7-5/8". The face of the register will cover up to 9-1/2" x 9-1/2".