20"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 11.75"h] Aluminum + Product Details Size –

+ Product Details Size – 22" x 24" or 24" x 22" is the size for the duct opening measurement only

you can attain the diameter of the vent

Great emphasis has been invested in the design of this product to prevent it from kinking in sharp bends & turns and to hold steady and at full diameter in all applications

+ Product Details Size – 14"w X 8"h is the size for the duct opening measurement only

20"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 21.75"w x 11.75"h] Aluminum + Product Details Size –+ Product Details Size 20"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 11. 75" Height Weather and Pest Proof These louvers are especially designed to prevent water from entering your home, and with a built in back 1 2" mesh they also protect you from annoying rodents like mice, rats, birds, and squirrels High Quality Aluminum The premium durable aluminum will never rust and it will never