24"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 21.75"h] w24h24 Measuring 3" in diameter for

Measuring 3" in diameter for the duct opening

with actual outer dimensions of 38

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+ How To Measure A Grille Measure the size of the vent opening

this diffuser is both functional and aesthetically pleasing

24"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 21.75"h] w24h24 Measuring 3" in diameter for+ Product Details Size 24"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 75" Width X 21. 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