36"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 17.75"h] ceiling Rust-Free Aluminum - Made from

Rust-Free Aluminum - Made from strong

+ Product Details Size - 6"w X 6"h is the size for the duct opening measurement only

Actual Front End Outer Dimensions Are 10" Diameter

Actual Filter Size – 27 3/4"w x 33 3/4" x 1"

36"w X 16"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 17.75"h] ceiling Rust-Free Aluminum - Made from+ Product Details Size 36"w X 16"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 17. 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