26"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 25.75"h] Fixed Blades with Damper + Product Details Size -

+ Product Details Size - 28"w X 18"h X 2"d (for duct opening measurement only)

and centralized air ducted units

Actual Filter Size – 15 3/4"w x 21 3/4" x 1"

+ Product Details Size - 6"w X 34"h is the size for the duct opening measurement only

featuring a 6" round duct opening

26"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 25.75"h] Fixed Blades with Damper + Product Details Size -+ Product Details Size 26"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 75" Width X 25. 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