If we need a tube with precise dimension, we need first extrude a tube with bigger diameter and thicker wall thickness, then we draw the tube to get a smaller tube with good roundness and even wall thickness. the process of drawing tube is: firstly, one end of the tube is contracted and insert a female tool into the tube, and then the tube passes the male mold with the pulling force of the machine. Then we get a tube with new dimensions. Drawn tubes have wide range applications: used for power cable protection on electric cars, for air conditioner, for telescopic ladders, for telescopic handles,etc.
