20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 21.75"w x 21.75"h] white actual front end outer dimensions

actual front end outer dimensions are approximately 28 5/8" width X 22 5/8" height

Smooth powder-coated white finish for a sleek look and scratch resistance

+ Product Details Size – 22" x 22" is the size for the duct opening measurement only

unrestricted airflow with a precise 50° angled design

+ Product Details Perfect Fit & Easy Sizing - Designed for a 36" x 28" OR 28" x 36" duct opening (measured at the opening)

20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 21.75"w x 21.75"h] white actual front end outer dimensions+ Product Details Size 20"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 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