The Y3347D Series Antennas provide 10.4dBd gain. Rugged and weatherproof, the construction of our heavy duty yagis feature 1″ aluminum U channel with 3/8″ solid elements. It is fully welded and polyester powder coated. In addition, the balun assembly has elastomeric thermoplastic filling and sealant. These yagi antennas are easily installed by one person. They can be field turned for lowest VSWR without cutting any elements. The Y3347D Series can withstand 125 MPH winds.