Our 104M series are a 4-way air register used for wall or ceiling openings. The stamped face allows for 4-way air deflection. Our Smooth glide technology ensures rattle free and quiet airflow from your central air system. Smooth glide also provides for smooth opening and closing of your back dampers. Our high-quality product will ensure years of continuous use. This product features: high-quality steel, white powder coat finish, smooth glide multi-shutter damper, louvers control the amount and direction of airflow.. Wall or ceiling registers controls airflow into a room. Smooth glide damper controls the amount and direction of airflow. Louvers control the amount and direction of airflow. 4-way deflection. High quality steel. Powder coated white. Duct opening measurements. Maximum Duct Opening Length (in.): 12. Maximum Duct Opening Width (in.): 12. Installation Location: Wall. Installation Location: Ceiling. Decorative: No