6"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 27.75"h] w32h32 + Product Details Size -

+ Product Details Size - 12"w X 22"h is the size for the duct opening measurement only

actual front end outer dimensions are 19" Width X 19" Height

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+ Product Details Size – 18" x 34" or 34" x 18" is the size for the duct opening measurement only

Design – Designed to withstand bends and sharp turns without kinking

6"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 27.75"h] w32h32 + Product Details Size -+ Product Details Size 6"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 7. 75" Width X 27. 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