无与伦比的质量和无可挑剔的价格 

导套使用SAE-52100/EN-31号钢，经过                                                                                                               高精度，超精密

淬硬，珩孔，磨外圆工序加工                                                                                                                                长久保持的高质量

硬度达到60-65HRC                                                                                                                                                 可靠的服务

直径范围从1.2mm至100mm                                                                                                                                   最好的价格