14"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 27.75"h] w18h18 + Product Details Size -

+ Product Details Size - 20"w X 8"h is the size for the duct opening measurement only

75"H – fits a 10" X 8" duct opening

+ Product Details Size – 16"w X 22"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 18" Width X 5" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

14"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 27.75"h] w18h18 + Product Details Size -+ Product Details Size 14"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 27. 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