34"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 17.75"h] Compatible with Duct 10" + Product Details Size -

+ Product Details Size - 18"w X 12"h is the size for the duct opening measurement only

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+ Product Details Size - 12"w X 8"h X 2"d (for duct opening measurement only)

+ Product Details Size – 22"w X 29"h is the size for the duct opening measurement only

+ Product Details Size - 32"w X 20"h is the size for the duct opening measurement only

34"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 17.75"h] Compatible with Duct 10" + Product Details Size -+ Product Details Size 34"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 17. 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