flate blades length: 650mm; blade material can be:SKH51,SKD11,SKS7,SK2, ... ,P20,K30 etc It can sharpen the flat blade of plastic crushers, blade material can be,SKH51,SKD11,SKS7,SK2,Cr12Mov ... (L,W,H) 1600mm*800mm*1500mm knife sharpening machine of plastic crusher