28"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 27.75"h] Aluminum Bar + Product Details Size -

+ Product Details Size - 26"w X 36"h is the size for the duct opening measurement only

+ Product Details Size – 25"w X 36"h is the size for the duct opening measurement only

our damper helps create a well-balanced indoor environment

+ Product Details Perfect Fit & Easy Sizing - Designed for a 6" x 28" or 28" x 6" duct opening (measured at the opening)

28"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 29.75"w x 27.75"h] Aluminum Bar + Product Details Size -+ Product Details Size 28"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 29. 75" Width X 27. 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