16"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 15.75"h] ceiling actual front end outer dimensions

actual front end outer dimensions are approximately 12 5/8" width X 12 5/8" height -

Designed with two mounting base options—solid and ring—it offers flexible installation

you can watch this informative video tutorial: How to Measure Your Vent Hole Before Ordering a Grille

actual front end outer dimensions are approximately 32 5/8" width X 28 5/8" height

16"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 17.75"w x 15.75"h] ceiling actual front end outer dimensions+ Product Details Size 16"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 17. 75" Width X 15. 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