8"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 13.75"h] w26h26 + Product Details Size –

+ Product Details Size – 10" round duct opening-

also referred to as T-Bar or Lay-in system

actual front end outer dimensions are approximately 15

with actual outer dimensions of 20

Quality Packaging - Carefully Shrink Wrapped with Cardboard Backing to Prevent Damage in Shipment

8"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 13.75"h] w26h26 + Product Details Size –+ Product Details Size 8"w X 12"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 13. 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