14"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 9.75"h] Compatible with Duct 8" + Product Details Size -

+ Product Details Size - 25"w X 26"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 22" width X 16" height

+ Product Description This aluminum flex duct is intended to be used in heating

Design – Cubic core eggcrate design Offers highest airflow efficiency at almost 95%

but you’ll appreciate the benefits over a long period of time

14"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 9.75"h] Compatible with Duct 8" + Product Details Size -+ Product Details Size 14"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 9. 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