20 X 6 (Duct Opening Size) Air Register Adjustable Aluminum Louvers with Damper Fits 20" x 6" opening. Register face is 21-3/4" x 7-3/4". Stylish 1 or 2 way register for ceiling or sidewall supply air. Aluminum construction. Vanes are adjustable left and right . Manual shutter damper opens and closes with lever. Color-White. Comes with mounting screws. Bar Face Adjustable Vanes 20x8