34"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 13.75"h] 8" Round Duct Pipe 6" width X 7

6" width X 7

actual front end outer dimensions are approximately 25

By simply measuring the width or the length of the vent

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34"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 13.75"h] 8" Round Duct Pipe 6" width X 7+ Product Details Size 34"w X 12"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 13. 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