Railway Insulator PA66: Nylon 66.69%, Glass Fiber 30%, Other 1 ... 30-35 35 9 Hardness HRR ≥110 118 Railway Insulator is used in the E fastening, SKL fastening and ... system in the railway. We are a leading railway insulator manufacturer in China. We can also make other rail ... fastenings such as railway screw, plastic dowel, rail pad, railway insulator, rail fish bolt, railway base plate, rail anchor, ...