16"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 19.75"h] 10" Diameter with actual outer dimensions of

with actual outer dimensions of 38

+ Product Details Size - 26"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 17

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 22" OR 22" x 32" duct opening (measured at the opening)

16"w X 18"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 19.75"h] 10" Diameter with actual outer dimensions of+ Product Details Size 16"w X 18"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 19. 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