26"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 29.75"h] 8" Diameter + Product Details Outer dimensions:

+ Product Details Outer dimensions: 7

Incorporated with Integral Butterfly Damper for full Airflow Control

+ Product Details Size - 22"w X 14"h X 2"d (for duct opening measurement only)

Achieve the perfect airflow with adjustable control by rotating the middle disk

Actual Filter Size – 21 3/4"w x 13 3/4" x 1"

26"w X 28"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 27.75"w x 29.75"h] 8" Diameter + Product Details Outer dimensions:+ Product Details Size 26"w X 28"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 27. 75" Width X 29. 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