Rocky Mountain Goods Floor Register Vent for 4-Inch by 10-Inch Vent Openings (Item Dimensions 11.5 x 5.5") - Easy Adjust Air Supply Lever - Premium Finish - Heavy Duty to Allow Walk on use (Brown)

4” by 10” floor vent register size (measure duct opening) - Actual Dimesions are 11 5/8" x 5 5/8", Heavy duty floor vent cover to allow walk on use, Decorative classic louvered design, Adjustable air supply lever