flate blades length: 650mm; blade material can be:SKH51,SKD11,SKS7,SK2,Cr12Mov,H13,9CrSi,6CrW2Si,W6Mo5Cr4V2,YG8,YT15,P20, ... flat blade of plastic crushers, blade material can be,SKH51,SKD11,SKS7,SK2,Cr12Mov,H13,9CrSi,6CrW2Si,W6Mo5Cr4V2,YG8,YT15,P20 ...