The EZ-FLO Wall/Ceiling Register is designed for wall or ceiling openings to control airflow for increased comfort. This register ensures quiet airflow from your central air system. These air vent covers are made of heavy-duty steel with a white powder-coated finish that resists flaking and rust for a longer-lasting performance. EZ-FLO HVAC vent register features a four-way air deflection system and adjustable multi-shutter dampers to allow a better flow of air. Air returns are composed of all steel with a sleek matte white finish. This vent register is ideal for sidewall and ceiling mounting and includes 4 screws for installation. From the Manufacturer EZ- FLO's 10" x 10" Four-Way Sidewall/Ceiling Register has four-way air deflection and an adjustable damper. The all steel construction and powder coated finish makes this diffuser a long-lasting, durable choice. The included hardware makes for a quick and easy installation. Outer measurements are 11-3/4" x 11-3/4".