... 300mm, 350mm, 400mm, 450mm, etc. 3.Heavy loading Railway Wheel Set:1. material: cast steel or cast iron 2. ... conical roller bearing, deep groove ball bearing10. weight: 70kgRailway Wheel Set Technical parameters: ModelMine Car Weight kgTrack mmWheel DiameterMax Axle ... are approved MA certificate with quality and safety.2. Hot sales, good price, good quality and reliable service system3. Supply ...