32"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 7.75"h] ceiling and the included installation screws

and the included installation screws make setup simple and efficient

+ Product Details Size - 8"w X 24"h X 2"d (for duct opening measurement only)

+ Product Details Size - 20"w X 30"h X 2"d (for duct opening measurement only)

with actual outer dimensions of 16

32"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 33.75"w x 7.75"h] ceiling and the included installation screws+ Product Details Size 32"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 33. 75" Width X 7. 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