32"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 23.75"h] d + Product Details Size – 4 X 12 Is CRFG2028 Width_14in

+ Product Details Size – 24"w X 28"h is the size for the duct opening measurement only

875" width X 19

+ Product Details Size – 6" x 18" or 18" x 6" is the size for the duct opening measurement only

+ Product Details Size – 32"w X 18"h is the size for the duct opening measurement only

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10” x 8” duct openings

32"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace Weather Resistant Air Grille with Screen Mesh [Outer Dimensions 33.75"w x 23.75"h] d + Product Details Size – 4 X 12 Is CRFG2028 Width_14in + Product Details Size – 24"w X 28"h is the size for the duct opening measurement only 875" width X 19