34"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 37.75"h] Insulated Line actual front end outer dimensions

actual front end outer dimensions are approximately 26 5/8" width X 10 5/8" height

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

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

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34"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 35.75"w x 37.75"h] Insulated Line actual front end outer dimensions+ Product Details Size 34"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 35. 75" Width X 37. 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