30"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 37.75"h] w22h22 Actual Filter Size – 21

Actual Filter Size – 21 3/4"w x 25 3/4" x 1"

+ Product Details Size - 36"w X 16"h X 2"d (for duct opening measurement only)

75"H – fits a 10" X 4" duct opening

Ideal for Walls & Ceilings: Designed for seamless installation in standard 12" X 12" duct openings

Actual Filter Size – 11 3/4"w x 9 3/4" x 1"

30"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 37.75"h] w22h22 Actual Filter Size – 21+ Product Details Size 30"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 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