26"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 7.75"h] Aluminum Adjustable Curved Blade + Product Details Size -

+ Product Details Size - 24"w X 26"h is the size for the duct opening measurement only

Designed for optimal air flow and lasting durability

you can attain the diameter of the vent

By means of the smooth surface

75" width X 33

26"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 7.75"h] Aluminum Adjustable Curved Blade + Product Details Size -+ Product Details Size 26"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 75" Width X 7. 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 wear