12"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 21.75"h] w32h32 Scratch-Resistant Finish - The powder-coated

Scratch-Resistant Finish - The powder-coated surface offers a smooth

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 36" OR 36" X 16" duct opening (measured at the opening)

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allowing you to choose the best option to suit your airflow needs

+ Product Details Size – 20"w X 12"h is the size for the duct opening measurement only

12"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 21.75"h] w32h32 Scratch-Resistant Finish - The powder-coated+ Product Details Size 12"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 21. 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