24"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 27.75"h] 8" Round Duct Pipe + Product Details Size –

+ Product Details Size – 30" x 36" or 36" x 30" is the size for the duct opening measurement only

+ Product Description Maximize your home’s airflow with this premium 2-way air supply grille

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+ Product Details Size - 30"w X 30"h is the size for the duct opening measurement only

24"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 27.75"h] 8" Round Duct Pipe + Product Details Size –+ Product Details Size 24"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 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