1.Use high quality tool steel imported from europe. By vacuum heat treatment the hardness can reach to 60 ¡§c 62 rockwell . 2.The outer circle accuracy, body and shaft of roller within the scope of 3 micron, ensure concentric roundness when working and enhance roller service life. 3.Each anvil --roller equipped with an gear according to the design requirements of machine manufacturers. The precision machining and anti-rust treatment is one of key for normal operating of the roller. Wooden box
