26"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 37.75"h] Color_Red Oak + Product Details Size -

+ Product Details Size - 26"w X 22"h X 2"d (for duct opening measurement only)

+ Product Details Perfect Fit & Easy Sizing - Designed for a 18" x 26" OR 26" x 18" duct opening (measured at the opening)

Design – Multi-shutter damper with handle lever for easy opening and closing - screws included

+ Product Details Size – 12" X 4" is the size for the duct opening (floor/vent hole) measurement only

26"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 37.75"h] Color_Red Oak + Product Details Size -+ Product Details Size 26"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 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