... your drawing.Technic:Our engineer has been working on excavator spare parts for more than 20 years,is very experienced in ... kinds of excavator and bulldozer undercarriage parts,such as Track Roller, Carrier Roller, Sprocket ,Segmnet, Front Idler, Track Link assembly,Track ... Shoes,Track Bolt and Nuts,Track Bush and Pin,Bucket Pin,Roller Guide,Idler Yoke and so on undercarriage parts ...