36"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 37.75"w x 37.75"h] Fixed Blades Constructed from sturdy 20-gauge steel

Constructed from sturdy 20-gauge steel

Actual Filter Size – 31 3/4"w x 11 3/4" x 1"

Ideal for Walls & Ceilings: Designed for seamless installation in standard 24" X 10" duct openings

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actual front end outer dimensions are approximately 26 5/8" width X 14 5/8" height

36"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 37.75"w x 37.75"h] Fixed Blades Constructed from sturdy 20-gauge steel+ Product Details Size 36"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 37. 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