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

+ Product Details Size - 6"w X 36"h X 2"d (for duct opening measurement only)

+ Product Details Size – 18"w X 34"h is the size for the duct opening measurement only

+ Product Details Size – 18"w X 25"h is the size for the duct opening measurement only

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 22" x 22" duct opening (measured at the opening)

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