22"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 9.75"h] Compatible with Duct 10" + Product Details Size -

+ Product Details Size - 20"w X 32"h is the size for the duct opening measurement only

Actual Filter Size – 17 3/4"w x 17 3/4" x 1"

+ Why HVAC Premium

+ Product Details Size – 26"w X 30"h is the size for the duct opening measurement only

22"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 9.75"h] Compatible with Duct 10" + Product Details Size -+ Product Details Size 22"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 75" Width X 9. 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 wear