12"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 35.75"h] Powder-Coated featuring a 8" round duct

featuring a 8" round duct opening

this grille offers durability and resistance to rust and corrosion

offering maximum flexibility

+ Product Details Size - 28"w X 28"h is the size for the duct opening measurement only

+ Product Details Perfect Fit & Easy Sizing - Designed for a 30" x 14" OR 14" x 30" duct opening (measured at the opening)

12"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 13.75"w x 35.75"h] Powder-Coated featuring a 8" round duct+ Product Details Size 12"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 75" Width X 35. 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