... 3.CE certificate & ISO certificate 4.Advanced technology. Structure:This machine consists of Base,Rack,Gland,Rollers,Bearing,Transmission device,Lubrication ... for option:Bearing or Copper bush or Nylon bush;5'Machine will be tripped off if overloaded to protect valuable electrical ... thin oil lubrication/Bearings XK-360 Two Roll Rubber Open Mixing Mill