22"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 23.75"h] 6in diameter + Product Details Size –

+ Product Details Size – 25"w X 22"h is the size for the duct opening measurement only

Multi-Shutter Damper With Handle Operator - Screws Included

Actual Filter Size – 17 3/4"w x 5 3/4" x 1"

that will overlap at wall joint

with actual outer dimensions of 18

22"w X 22"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 23.75"w x 23.75"h] 6in diameter + Product Details Size –+ Product Details Size 22"w X 22"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 23. 75" Width X 23. 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