1,Product:track roller 2.Warranty:2000hours 3.Certification:ISO9001,ISO14001 4.Hardness:HCR52-58 5.Weight:33.9kg 1.Product:Track roller2.Part Number:16341433.Main Product:Excavator and bulldozer under carriage parts ,such as track roller,carrier roller,sprocket,front idler,track link assy,track shoe,track bolt and nuts,track bush and pin,buck pin,recoil spring,spring,h-link rods,idler yoke,roller ...