8" X 20" Or 20" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 21.75] RV Mobile Home These won't hinder the flow

These won't hinder the flow of air

+ Product Details Size – 14" x 36" or 36" x 14" is the size for the duct opening measurement only

+ Product Description Enhance your HVAC system's efficiency and your home's aesthetics with our premium aluminum air vent diffuser

+ Product Details Size & Compatibility – The size of sheet metal pipe is 6" round x 48" long

Brand: HVAC Premium

8" X 20" Or 20" X 8" Heavy Duty Floor Grille - Fixed Blades Air Grille - Brown [Outer Dimensions: 9.75 X 21.75] RV Mobile Home These won't hinder the flow+ Product Details Size 8"w X 20"h or 20" x 8" is the size for the duct opening measurement only, actual front end outer dimensions are approximately 9. 75" width X 21. 75" height. High Quality High grade steel construction meant for high foot traffic areas. Installation Location Floor. Design Easy drop in installation Powder Coat Finish Smooth, shiny, scratch resistant, with no sharp edges. Looks like it was just waxed. Quality Packaging Carefully