36"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 37.75"w x 37.75"h] Adjustable Return Upgrade your air distribution strategy

Upgrade your air distribution strategy today – invest in the efficiency and convenience of the 6" Butterfly Damper

+ Product Details Size - 16"w X 26"h is the size for the duct opening measurement only

75"H – fits a 16" X 4" duct opening

Experience hassle-free installation and full adjustability for optimal airflow

Filter Size - 25

36"w X 36"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - White [Outer Dimensions 37.75"w x 37.75"h] Adjustable Return Upgrade your air distribution strategy+ 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