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 guaranteeing efficient ventilation throughout your

guaranteeing efficient ventilation throughout your space

Ideal for Walls & Ceilings: Designed for seamless installation in standard 30" X 6" duct openings

actual front end outer dimensions are approximately 20 5/8" width X 27 5/8" height -

actual front end outer dimensions are approximately 20 5/8" width X 26 5/8" height

+ 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 guaranteeing efficient ventilation throughout your+ 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