8"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 21.75"h] w14h14 + Product Details Perfect Fit

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 8" or 8" x 6" duct opening (measured at the opening)

durability

+ Product Details Size – 12"w X 10"h is the size for the duct opening measurement only

+ Product Description Enhance your ventilation system with our high-quality grilles and registers

actual front end outer dimensions are approximately 27 5/8" width X 28 5/8" height

8"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 21.75"h] w14h14 + Product Details Perfect Fit+ Product Details Size 8"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 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 wear