18"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 23.75"h] Compatible With Duct 10in Box or Other Attachments Needed

Box or Other Attachments Needed

+ Product Details Size – 8" round duct opening

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+ Product Details Size – 34" x 36" or 36" x 34" is the size for the duct opening measurement only

actual front end outer dimensions are approximately 16 5/8" width X 32 5/8" height

18"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 19.75"w x 23.75"h] Compatible With Duct 10in Box or Other Attachments Needed+ Product Details Size 18"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 75" Width X 23. 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