... . The company mainly produces all kinds of excavator and bulldozer undercarriage parts,such as Track Roller, Carrier Roller ... assembly,Track Shoes,Track Bolt and Nuts,Track Bush and Pin,Bucket Pin,Roller Guide,Idler Yoke and so on undercarriage parts. ... :2008 international standard management system certification, popular Chinese and foreign customers.1:Production Specification: Brand:RHKMaterial:45- ...