... working hours Sprocket for Komatsu, Hitachi, Kato, Catepillar, Sumitomo, Kobelco etc.Guarantee2050 working hours.Certificate:ISO9001, Japan KCXMaterial:45Mn SCSiMn2H ... D8K, D9N, etc. Sumitomo SH120,SH280, SH300, etc Kobelco SK07,SK60,SK100,SK120,SK200, SK220, SK230,SK250,SK300, SK320, SK350, SK450,SK460 ... 5.5MMRemarksThe table is for your information only. More details SK200 OEM EXCAVATOR SPROCKET