36"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 7.75"h] Powder-Coated If your duct opening is

If your duct opening is 14 inches in diameter

you can attain the diameter of the vent

+ Product Details Size - 10"w X 16"h is the size for the duct opening measurement only

actual front end outer dimensions are approximately 27 5/8" width X 32 5/8" height

6"w X 6"h Is The Size For The Duct Opening Measurement Only

36"w X 6"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 37.75"w x 7.75"h] Powder-Coated If your duct opening is+ Product Details Size 36"w X 6"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 37. 75" Width X 7. 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 wear