30"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 23.75"h] 12" Diameter + Product Details Size -

+ Product Details Size - 18"w X 18"h X 2"d (for duct opening measurement only)

+ Product Details Size - 8"w X 6"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 26" OR 26" x 32" duct opening (measured at the opening)

+ Product Details Size – 18"w X 24"h is the size for the duct opening measurement only

30"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 23.75"h] 12" Diameter + Product Details Size -+ Product Details Size 30"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 75" Width X 23. 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