1.difference spare parts 2..According to customer requirements 3.Safe-packing 4.Best price. 5.do OEM Part name: difference spare parts A:certification: ISO9001:2008B.Products Available bolts, screws, nuts, rivets, Heatsink, shafts(axles, spline shafts, dart shafts),gears (pinions, wheels ) bearing, LED light-fixture, auto parts, electronic parts, etc.C.Advantage1. Competitive price with good ...