Front idler for Caterpillar,Komatsu.Hitachi,etc. 1..Surface Hardness:HRC49~56 2.Depth:5~8 3.good quality,good price Xiamen EBpart Manufacturing Co.,Ltd have strict quality management to produce effective and stable products,and meet customer's demand. We produce high performance and reliability front idler group used for heavy construction machinery,such as caterpillar,komatsu,hitachi,daewoo, ...