18"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 19.75"w x 25.75"h] 6" Round Duct Pipe actual front end outer dimensions

actual front end outer dimensions are approximately 22 5/8" width X 36 5/8" height

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Adjustable airflow control – Adjustable airflow control: The system allows users to customize the amount of air supply

+ Product Details Perfect Fit & Easy Sizing - Designed for a 8" x 32" or 32" x 8" duct opening (measured at the opening)

5" Wide x 12" Tall x 2

18"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 19.75"w x 25.75"h] 6" Round Duct Pipe actual front end outer dimensions+ Product Details Size 18"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 19. 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