28"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 13.75"h] 12in diameter + Product Details Size –

+ Product Details Size – 24" x 30" or 30" x 24" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 21

+ Product Details Size – 14" x 26" or 26" x 14" is the size for the duct opening measurement only

+ Product Details Size – 6" x 32" or 32" x 6" is the size for the duct opening measurement only

28"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 13.75"h] 12in diameter + Product Details Size –+ Product Details Size 28"w X 12"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 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