Electric slip rings: 1.Material:Brass copper ,steel and alloy metal 2.Good designed 3.Better performance 4.Competitive price HH Power Co.The prodcuts:slip ring for wind turbineMaterial:Steelring:4,3 main rings and one grounding ringApplication:wind turbine,offshore wind turbineW:www.huahaipower.en.alibaba.comT/P:86-317-7766068/7766263Please feel free to contact us. Electric slip rings