10"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 29.75"h] Color_Red Oak Wood const isOpen = item

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+ Product Details Perfect Fit & Easy Sizing - Designed for a 20" x 26" OR 26" x 20" duct opening (measured at the opening)

and then smoothly drop in the grill

actual front end outer dimensions are approximately 30 5/8" width X 10 5/8" height

+ Product Details Size – 10"w X 12"h is the size for the duct opening measurement only

10"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 29.75"h] Color_Red Oak Wood const isOpen = item+ Product Details Size 10"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 29. 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