8"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 37.75"h] w16h16 + Product Details Size –

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

+ Product Details Size - 6"w X 28"h X 2"d (for duct opening measurement only)

Durable Construction – Made from high-quality

Actual Filter Size – 35 3/4"w x 27 3/4" x 1"

+ Product Details Size – 28" x 36" or 36" x 28" is the size for the duct opening measurement only

8"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 9.75"w x 37.75"h] w16h16 + Product Details Size –+ Product Details Size 8"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 9. 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 wear