The TRACK link is 40Mn2 or 4Mn.Compatible:(1) Komatsu( 2) Hitachi( 3) ... Product Description Compatible mode: 1) Komatsu: PC60-5-6-7, PC100, PC120, PC200-5, PC220-5, PC300-5, D31, D50, D80 (D85), D155 2) Hitachi ... , D6D, 4) Kobelco: SK200,5) Sumitomo: SH120, SH200, SH280, SH300, SH400 6) Mitsubishi: MS110, MS120, MS180 the product can be customized TRACK link