we are professional undercarriage parts manufacturer and exporter for excavator,bulldozer. we desiign standard parts for komatsu,hitachi,caterpillar including bottom roller, top roller, idler and sprocket,track link. we have sold our products to USA,UK,ITALY,MIDDLE-EAST AND INDIAN xxxxxWelcome solid enquiry from heavy equipment&spare parts trader, and Mining xxxxxMore details, pls contact Ms.Daisy.