8"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 31.75"h] Compatible with Duct 10" + Product Details Size –

+ Product Details Size – 10" x 16" or 16" x 10" is the size for the duct opening measurement only

Carefully Shrink Wrapped With Cardboard Backing To Prevent Damage In Shipment

please note that the total outer dimensions of the grille measure 10" in diameter

+ Product Details Perfect Fit & Easy Sizing - Designed for a 32" x 18" OR 18" x 32" duct opening (measured at the opening)

and yet lightweight and easy to handle

8"w X 30"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 31.75"h] Compatible with Duct 10" + Product Details Size –+ Product Details Size 8"w X 30"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 31. 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