18"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 13.75"h] w34h34 background-color: #000

background-color: #000

actual front end outer dimensions are approximately 22 5/8" width X 52 5/8" height

+ Product Details Size - The listed 8" diameter refers specifically to the size of the duct opening

+ Product Details Size – 30"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 34 5/8" width X 22 5/8" height

18"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 13.75"h] w34h34 background-color: #000+ Product Details Size 18"w X 12"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 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