1.ISO9001,Alibaba Assessment,SGS certificate;2.Technique:forging;3.OEM supplier;4.Hardening:induction hardening 1.Description of items:High quality of Spare parts for D155,including track link,Track shoe,track roller,front roller,carrier roller,top roller,sprocket,idler,track bolt and nut;2. Material of the D155 sapre parts:Track Link:35MnB;Track shoe:25MnBTrack roller,carrier roller,sprocket, ...