18"W X 24"H [Duct Opening] ALUMINUM RETURN GRILLE - EASY AIR FLOW - LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 25.875"H] Blade Filter Size - 13 Product Description Enhance your CRFG68 Victorian Floor Registers

Filter Size - 13

+ Product Details Size – 22"w X 32"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 12" OR 12" x 20" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 16" Or 16" x 34" duct opening (measured at the opening)

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 8" duct openings

18"W X 24"H [Duct Opening] ALUMINUM RETURN GRILLE EASY AIR FLOW LINEAR BAR GRILLES [OUTER DIMENSIONS: 19.875"W X 25.875"H] Blade Filter Size 13 Product Description Enhance your CRFG68 Victorian Floor Registers Filter Size 13 + Product Details Size – 22"w X 32"h is the size for the duct opening measurement only