1.carbon steel blade 2.for automation equipment 3.blade for cutting rubber 4.specification,20*0.4*20 Our company uses the high quality import materials to produce the blade.The mainly materials are SK2,SK5,SK4,SK7,SKS7,SKS9,SKH-51,SKH-9,SKH-2,SKD11,H13K,H13,Cr12MoV,9CrSi and so on.Our factory is using the full range of sharpening automation equipment:automatic stamping equipment----heat treating ...