Green sands casting, Wheel of Tracked Vehicle Undercarriages, using for tractor or excvavtor and caterpillar machine, it is ADI or Ductile iron parts. Precision in CT10.Green sands casting, Wheel of Tracked Vehicle Undercarriages, using for tractor or excvavtor and caterpillar machine, it is ADI or Ductile iron parts. Precision in CT10.