14"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 9.75"h] Color_Aluminum + Product Details Size –

+ Product Details Size – 30"w X 18"h is the size for the duct opening measurement only

listed size +2" diameter

Ideal for Walls & Ceilings: Designed for seamless installation in standard 10" X 10" duct openings

Insulation – A thick blanket of fiberglass insulation provides you with an R-Value of 8

14"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 9.75"h] Color_Aluminum + Product Details Size –+ Product Details Size 14"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 9. 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 wear