28"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 11.75"h] 3-Way or 4-Way actual front end outer dimensions

actual front end outer dimensions are 22" width X 6" height

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+ How To Measure A Grille Overall Size:

Slim Sliding Metal Damper To Control and Adjust Airflow

28"w X 10"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 11.75"h] 3-Way or 4-Way actual front end outer dimensions+ Product Details Size 28"w X 10"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 11. 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