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] w14h14 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 6" OR 6" X 18" duct opening (measured at the opening)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 16" x 25" OR 25" X 16" duct opening (measured at the opening)

75"H – fits a 10" X 10" duct opening

+ Product Details Size - 14"w X 32"h X 2"d (for duct opening measurement only)

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] w14h14 + Product Details Perfect Fit+ 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