This galvanized steel turbine head is ideal for wind-powered generators. With a round top shape and a rough opening of 12 inches, it is designed for use on a roof mount. The product measures 11 inches in height and has a width of 17.5 inches, both in inches. The intake/exhaust feature is exhaust, and the coverage area is 91 square feet, with a net-free area of 91 square inches. The product is internally braced and has a paintable finish, but it is not UV resistant. A screen is not included, and it weighs 6.2 lbs. The product is returnable within 90 days and is categorized under Home & Garden, Home Improvement, Building & Hardware, and Other Home Building & Hardware.