30"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 29.75"h] with filter + Product Details Size –

+ Product Details Size – 4"w X 12"h is the size for the duct opening measurement only

Installation is simple

75" width X 17

actual front end outer dimensions are approximately 10 5/8" width X 30 5/8" height

+ Product Details Perfect Fit & Easy Sizing - Designed for a 34" x 10" Or 10" x 34" duct opening (measured at the opening)

30"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 29.75"h] with filter + Product Details Size –+ Product Details Size 30"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 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