The H167-MMB 04X10 is 4 in. x 10 in. 1-way air diffuser used for floor openings. The crafted modern contempo design is perfect for your decorative needs. Our patented smooth glide technology ensures your dampers are 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 ensures years of continuous use.. Air deflection: 1-way. Color: Matte Black. Color Family: Blacks. Installation Location: Floor. Material: Steel. Maximum Duct Opening Length (in.): 10 in. Maximum Duct Opening Width (in.): 4 in. Product Weight (lb.): 1.7 lb. Returnable: 90-Day. Shape: Rectangular. Outside Length (in.): 5.5 in. Outside Width (in.): 11.5 in. Maximum Duct Opening Width (in.): 4 in. Maximum Duct Opening Length (in.): 10 in. Installation Location: Floor. Outside Width (in.): 11.5 in. Shape: Rectangular