... power, little harm to brake drum.3:Environment friendly, high temperature tolerance and steady friction coefficient4:Material:carbon fiber, ceramic, mineral ... asbestos,Ceramic, Organic or according to customer’s requirements.Friction Coefficient0.42±0.06Garantee30,000-50,000 KM.Wear ... Tester, Hardness Tester 5:Contact:Kathleen zhang Ichiban Everstar Friction Ningguo Co.,Ltd.2806 No.24, Ruyi Street, ...