14"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 13.75"h] Adjustable Return + Product Details Size –

+ Product Details Size – 18"w X 8"h is the size for the duct opening measurement only

See our separate listing for T-Bar supply grille

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+ Product Details Size - 30"w X 10"h is the size for the duct opening measurement only

32" x 8" Aluminum Spiral Duct Air Vent Grille Cover - Fully Adjustable Double Deflection HVAC Air Supply

14"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 13.75"h] Adjustable Return + Product Details Size –+ Product Details Size 14"w X 12"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 13. 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