M4220C vertical holing machine is a kind of machine tool which is applied to grind and polish the inside surface of cylinders, tubes etc. It can grind one workpiece or more than one according to different specifications. The diameter of workpiece can be 30mm to 1,000mm and length up to 5m.Packing:Wooden cases producing area:China payment:L/C, T/T supplying capacity:50sets/year