... , GGG45 and so on. 3.with machining and zinc plating... wheel hub, parts for trailer,material grey cast iron GG25 and GGG45 ... .5kg Surface: Zinc paintingApplied software for specification drawings: Pro/E, Auto CAD, Solid Work 2001,CAXA, UG, CAD/CAM/CAEDesign and ... , drilling, planning, grinding machines and assembly also available. cast iron wheel hub