... : cast steel or cast iron 2. constitute: two wheels, one axle, four bearings, and other parts.3. ... 900mm, and etc.5. the type of the wheels: hollow wheel sets and solid wheel sets.6.the ... diameter of the wheels: 300mm, 350mm, 400mm, 450mm7.the material of ... two9.the material of the bearing: LYC32212, conical roller bearing, deep groove ball bearing10. weight: 70kgPlease contact ...