12"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 13.75"w x 13.75"h] with filter actual front end outer dimensions

actual front end outer dimensions are approximately 34 5/8" width X 36 5/8" height

+ Product Details Size - 26"w X 8"h X 2"d (for duct opening measurement only)

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+ Product Details Size - 20"w X 24"h is the size for the duct opening measurement only

+ Product Spec Sheet Lay-In 3 Coned Spec Sheet

12"w X 12"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 13.75"w x 13.75"h] with filter actual front end outer dimensions+ Product Details Size 12"w X 12"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 13. 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