10"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 25.75"h] w30h30 [Outer Dimensions: 50

[Outer Dimensions: 50

Actual Filter Size – 7 3/4"w x 23 3/4" x 1"

And is classified as Class 1 Fire Proof - B1

+ Product Details Size - 34"w X 12"h is the size for the duct opening measurement only

10"w X 24"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 11.75"w x 25.75"h] w30h30 [Outer Dimensions: 50+ Product Details Size 10"w X 24"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 11. 75" Width X 25. 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