16"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 33.75"h] Grille The total outer size of

The total outer size of this grille is the listed size

+ Product Details Size – 24"w X 20"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 21

Produced in accordance with ISO 9001-2008 Quality Management System

+ Product Details Size – 10"w X 16"h is the size for the duct opening measurement only

16"w X 32"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 33.75"h] Grille The total outer size of+ Product Details Size 16"w X 32"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 33. 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