14"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 15.75"h] 14" Round Duct Pipe + Product Details Size -

+ Product Details Size - 30"w X 36"h is the size for the duct opening measurement only

the actual front end outer dimensions are 7" in diameter

including the ability to mount without removing the thermostat when using the ring base

+ Product Details Size - 34"w X 32"h is the size for the duct opening measurement only

Every part is hand inspected for quality before it is packaged

14"w X 14"h Aluminum Exterior Gable Louver Vent for Walls & Crawlspace - Weather-Resistant Air Grille with Screen Mesh - [Outer Dimensions 15.75"w x 15.75"h] 14" Round Duct Pipe + Product Details Size -+ Product Details Size 14"w X 14"h X 2"d (for duct opening measurement only); actual front end outer dimensions are 15. 75" Width X 15. 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