[Application Features] FD-2 copper with PTFE, is polytetrafluoroethylene (PTFE) as the main raw material, filled with copper and other wear-resistant material, the mold pressing and sintering, has good wear resistance. Its tensile strength to meet the single piston ring conditions, low coefficient of friction in the oil-lubricated and non-lubricated conditions can be used normally, automotive shock absorbers, ideal for piston rings. [Application] Currently, Audi and Volkswagen Santana, use this product within Beverly car shock absorbers, it long maintained a low coefficient of friction and wear resistance. The main parameters Tensile strength: 22N / mm2 friction coefficient μ: 0.09 ~ 0.20 Temperature range: -100 ~ 250 ℃ Highest sliding velocity: 1.5m / s