10"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 35.75"h] Color_Red Oak Actual Filter Size – 33

Actual Filter Size – 33 3/4"w x 17 3/4" x 1"

+ Product Details Size – 28"w X 30"h is the size for the duct opening measurement only

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Slots Are Angled to Diversify The Airflow In 2 Way Direction - Great for Wall and Floor & ceiling Applications

+ Product Details Size - 4"w X 24"h is the size for the duct opening measurement only

10"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 35.75"h] Color_Red Oak Actual Filter Size – 33+ Product Details Size 10"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 35. 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