At HETD Co.,LTD, we have been specializing in the manufacture and export of transmission parts, specially the sprockets，gears，coupling,pulleys and shafts for more than 18 years. Located in Hangzhou and Huangshan, with the factory production faculty of over 200 employees. HETD is a leading machine parts manufacturer, with exprot clients in Europe, the United States, Africa, and the Middle East.