16"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 31.75"h] 8" Diameter actual front end outer dimensions

actual front end outer dimensions are approximately 27 5/8" width X 8 5/8" height

& EN 13180 standards

+ Product Details Size – 14"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 20"w X 4"h is the size for the duct opening measurement only

+ Product Details Size - 16"w X 36"h is the size for the duct opening measurement only

16"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 31.75"h] 8" Diameter actual front end outer dimensions+ Product Details Size 16"w X 30"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 31. 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