D80 Track Link/chain Main Material:40Cr40Mn2 Pin hardness:HRC32-36 Fujian Tianzhong ... ,PC300-7,PC350-7,PC400D20,D30,D31,D50,D60,D65,D80,D85,D155HITACHI EX30,EX60,EX70,EX100,EX100-1/2/3/5 ... -3,R290-7,R335,R305MITSUBISHIMS180,BD2GQualification Certificate: KOMASTU Dozers parts D80 LINK