16"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 13.75"h] Curved Blade Steel actual front end outer dimensions

actual front end outer dimensions are approximately 28 5/8" width X 10 5/8" height

+ Product Details Size – 14" x 14" is the size for the duct opening measurement only

+ Product Details Size - The listed 8" diameter refers specifically to the size of the duct opening

+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 22" OR 22" x 20" duct opening (measured at the opening)

Adjustable airflow control - by rotating the middle disk

16"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 13.75"h] Curved Blade Steel actual front end outer dimensions+ Product Details Size 16"w X 12"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 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