6"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 35.75"h] Grilles + Product Details Size -

+ Product Details Size - 30"w X 8"h is the size for the duct opening measurement only

to Ensure Perfect Smooth Finish

The integral design allows you to easily adjust the curved blades

actual front end outer dimensions are approximately 14 5/8" width X 38 5/8" height

+ Product Details Size - 25"w X 4"h is the size for the duct opening measurement only

6"w X 34"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 7.75"w x 35.75"h] Grilles + Product Details Size -+ Product Details Size 6"w X 34"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 7. 75" Width X 35. 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