D80 Track Link/chain Main Material:40Cr40Mn2 Pin hardness:HRC32-36 Fujian Tianzhong ... ,D155HITACHI EX30,EX60,EX70,EX100,EX100-1/2/3/5,EX120,EX200,EX200-1,EX200-2,EX200-5,EX200-3,EX300-1,EX300-2,EX300-3,EX300-5 ... ,R290-7,R335,R305MITSUBISHIMS180,BD2GQualification Certificate: KOMASTU Dozers parts D80 LINK