30"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 9.75"h] w25h25 + Product Details Size -

+ Product Details Size - 6"w X 20"h X 2"d (for duct opening measurement only)

powder-coated finish adds a touch of elegance while also being scratch-resistant

Actual Filter Size – 33 3/4"w x 21 3/4" x 1"

actual front end outer dimensions are approximately 3

+ Product Details Size - The listed 4" diameter refers specifically to the size of the duct opening

30"w X 8"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 31.75"w x 9.75"h] w25h25 + Product Details Size -+ Product Details Size 30"w X 8"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 31. 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