8"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 25.75"h] Aluminum Adjustable Curved Blade + Product Details Size –

+ Product Details Size – 25"w X 18"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 12" Width X 6" Height - SEE IN DESCRIPTION HOW TO MEASURE A GRILLE

+ Why HVAC Premium

Designed for a 1" thick filter

actual front end outer dimensions are approximately 24 5/8" width X 27 5/8" height

8"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 25.75"h] Aluminum Adjustable Curved Blade + Product Details Size –+ Product Details Size 8"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 75" Width X 25. 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