The 800 series is a round air diffuser. This step down ringed diffuser is used to cover duct openings. Simple, versatile, east to operate, and easy to install. Our product is constructed to ensure maximum airflow and the simple design will compliment your home decor. Product features: high quality steel, white powder coat finish, step down diffuser rings deflect air stream 360°.Duct diffuser streams air into your roomMade of high quality steelWhite powder coat finishStep down diffuser rings deflect air stream 360°