1.Procuct:bottom roller 2.Certification:ISO9001,ISO14001 3.Warranty:2000 hours 4.Weight:86.1kg 5.Hardness:HCR52-58 1.Product:Botton roller2.Part Number:1081-044113.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, ...