10"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 31.75"h] Material_Aluminum + Product Details Size -

+ Product Details Size - 22"w X 18"h is the size for the duct opening measurement only

75"H – fits a 20" X 4" duct opening

75" width X 13

+ Product Details Size – 10"w X 8"h is the size for the duct opening measurement only

+ Product Details Size - 26"w X 14"h is the size for the duct opening measurement only

10"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 31.75"h] Material_Aluminum + Product Details Size -+ Product Details Size 10"w X 30"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 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