24"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 25.75"w x 37.75"h] Compatible With Duct 6in + Product Details Size -

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

+ Product Details Size - 26"w X 8"h is the size for the duct opening measurement only

installation is a breeze

Actual Filter Size – 33 3/4"w x 11 3/4" x 1"

24"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 25.75"w x 37.75"h] Compatible With Duct 6in + Product Details Size -+ Product Details Size 24"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 25. 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