10"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 19.75"h] w24h24 + Product Details Size –

+ Product Details Size – 6"w X 12"h is the size for the duct opening measurement only

Installation Location – Ceiling

With plain ends

it ensures long-lasting durability

4" X 10" Is The Size For The Duct Opening (floor/vent hole) Measurement Only

10"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 19.75"h] w24h24 + Product Details Size –+ Product Details Size 10"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 19. 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