36"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 27.75"h] 12" Diameter allowing you to choose the

allowing you to choose the best option to suit your airflow needs

Discover this game-changer at HVACPremium

This simple adjustment reduces HVAC strain

+ Product Details Size - 6"w X 4"h is the size for the duct opening measurement only

+ Product Details Size – 26" x 34" or 34" x 26" is the size for the duct opening measurement only

36"w X 26"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 27.75"h] 12" Diameter allowing you to choose the+ Product Details Size 36"w X 26"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 27. 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