36"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 23.75"h] w28h28 accordion-content { display: block

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+ Product Details Size – 6" round duct opening-

+ Product Details Size - 26"w X 20"h is the size for the duct opening measurement only

Actual Filter Size – 35 3/4"w x 7 3/4" x 1"

+ Product Details Size - 25"w X 10"h is the size for the duct opening measurement only

36"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 23.75"h] w28h28 accordion-content { display: block+ Product Details Size 36"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 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