32" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER - EASY AIR FLOW - LINEAR BAR GRILLES 25 Feet Long Ideal for Walls & Ceilings: WD G128 Product Details Size 25 Floor Grille Toe Space

Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 6" duct openings

+ Product Details Size – 10"w X 8"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 20" OR 20" x 22" duct opening (measured at the opening)

For instance

Actual Filter Size – 23 3/4"w x 23 3/4" x 1"

32" X 20" ALUMINUM RETURN FILTER GRILLE FOR 1" FILTER EASY AIR FLOW LINEAR BAR GRILLES 25 Feet Long Ideal for Walls & Ceilings: WD G128 Product Details Size 25 Floor Grille Toe Space Ideal for Walls & Ceilings: Designed for seamless installation in standard 18" X 6" duct openings + Product Details Size – 10"w X 8"h is the size for the duct opening measurement only