14"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 29.75"h] Compatible with Duct 8" actual front end outer dimensions

actual front end outer dimensions are approximately 27 5/8" width X 22 5/8" height

+ Product Details Size - 25"w X 24"h is the size for the duct opening measurement only

875" height

+ Product Details Size - 6"w X 6"h X 2"d (for duct opening measurement only)

expanding or retracting the gap to meet your precise needs

14"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 29.75"h] Compatible with Duct 8" actual front end outer dimensions+ Product Details Size 14"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 29. 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