High Performance: This 9 element yagi antenna provides excellent wide band performance. Rugged and weatherproof. The heavy duty mounting plate is extruded aluminum. Stainless steel V bolts are provided for long term reliability and resistance to corrosion. The elements are welded to the boom to provide excellent stability and intermod resistant operation. Lightweight and Durable: This yagi antenna is easily installed by one person, yet is designed to withstand 125 MPH winds.