28"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 21.75"h] Width_20in Both lines taped together every

Both lines taped together every 18in for easier handling & installation

+ Product Details Size – 8" x 8" is the size for the duct opening measurement only

The lightweight yet rigid construction ensures durability without sacrificing ease of handling

+ Product Details Size - 16"w X 6"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 30 5/8" width X 16 5/8" height -

28"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 21.75"h] Width_20in Both lines taped together every+ Product Details Size 28"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 21. 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