20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 21.75"w x 21.75"h] Filter Grille Actual Filter Size – 25

Actual Filter Size – 25 3/4"w x 11 3/4" x 1"

Ideal for Walls & Ceilings: Designed for seamless installation in standard 14" X 10" duct openings

this grille offers a seamless blend of functionality and aesthetics

+ Product Details Size – 10" x 10" is the size for the duct opening measurement only

+ Product Details Size – 48"w X 24"h is the size for the duct opening measurement only

20"w X 20"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Black [Outer Dimensions 21.75"w x 21.75"h] Filter Grille Actual Filter Size – 25+ Product Details Size 20"w X 20"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 21. 75" Width X 21. 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