18"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 11.75"h] Powder-Coated + Product Details Size -

+ Product Details Size - 22"w X 18"h X 2"d (for duct opening measurement only)

+ Product Details Size – 12" x 28" or 28" x 12" is the size for the duct opening measurement only

with actual outer dimensions of 30

actual front end outer dimensions are 3"

18"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 11.75"h] Powder-Coated + Product Details Size -+ Product Details Size 18"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 75" Width X 11. 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