... is 20~25years 3.High technical prote Wind turbine 20kw with CE certification for industry use Detailed Product Description Machine Type: horizontal-axis ... generating efficiency3.Glassfibre high efficiency blades4.Neodymium magnets and bearing with high performance5.Pre-yaw design for tail vane6.Designed ... Rusia , Italy, USA, England and so on. Wind turbine 20kw with CE certification for industry use