28"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 37.75"h] Filter Grille 75"H – fits a 24"

75"H – fits a 24" X 6" duct opening

+ Product Details Size – 12"w X 28"h is the size for the duct opening measurement only

and smooth surface

+ Product Details Size - 16"w X 28"h is the size for the duct opening measurement only

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

28"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 37.75"h] Filter Grille 75"H – fits a 24"+ Product Details Size 28"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 37. 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