36"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Brown [Outer Dimensions 37.75"w x 37.75"h] Return Actual Filter Size – 11

Actual Filter Size – 11 3/4"w x 19 3/4" x 1"

Both lines taped together every 18in for easier handling & installation

Universal Fit – Measures 6" wide x 3-1-13/16" high x 3-1/8" deep

allow you to customize airflow direction with ease

+ How To Measure A Grille Overall Size:

36"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - Brown [Outer Dimensions 37.75"w x 37.75"h] Return Actual Filter Size – 11+ Product Details Size 36"w X 36"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 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