8"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 29.75"h] w28h28 + Product Details Size –

+ Product Details Size – 10"w X 32"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 30" OR 30" x 32" duct opening (measured at the opening)

with an additional 1 7/8" width and 2" height

+ Product Details Size - 26"w X 32"h is the size for the duct opening measurement only

8"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 29.75"h] w28h28 + Product Details Size –+ Product Details Size 8"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 29. 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