24"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 35.75"h] w32h32 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 18" OR 18" x 36" duct opening (measured at the opening)

+ Product Details Size – 12"w X 10"h is the size for the duct opening measurement only

+ Product Details Size - 36"w X 26"h is the size for the duct opening measurement only

this diffuser ensures long-lasting durability and adds a touch of elegance to any space

24"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 25.75"w x 35.75"h] w32h32 + Product Details Perfect Fit+ Product Details Size 24"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 75" Width X 35. 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