6"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 25.75"h] 2-Way actual front end outer dimensions

actual front end outer dimensions are approximately 20 5/8" width X 22 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 24" OR 24" x 30" duct opening (measured at the opening)

actual front end outer dimensions are approximately 28 5/8" width X 28 5/8" height

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6"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 25.75"h] 2-Way actual front end outer dimensions+ Product Details Size 6"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 7. 75" Width X 25. 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 wear