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] Brown + Product Details Size –

+ Product Details Size – 14"w X 16"h is the size for the duct opening measurement only

Design – Premium plated finish and modern contemporary design forming a luxurious piece

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 28" OR 28" x 20" duct opening (measured at the opening)

engineered for seamless 360-degree airflow in T-bar ceilings

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] Brown + Product Details Size –+ 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