22"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 19.75"h] 6" Diameter + Product Details Size –

+ Product Details Size – 20"w X 22"h is the size for the duct opening measurement only

Easy Installation – Just pop the diffuser right into the wall duct hole and the side springs will hold it right into place so that it looks clean

+ Product Details Size – 16"w X 24"h is the size for the duct opening measurement only

75"H – fits a 6" X 6" duct opening

22"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 19.75"h] 6" Diameter + Product Details Size –+ Product Details Size 22"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 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