We passed ISO9000 authentication in 2001, and set up a complete system of quality guarantee according to the international standards. Our products have passed the sample-checks held by Jinan Bureau of Quality Surveillance and Inspection for several years. The oil and pneumatic cylinders and hydraulic work stations have been chosen to use by Jinan Steel and Iron Group, Shandong Construction Machinery Factory, Jinan Jinzhong Scale Equipment Inc., Jinan Secondary Machine Tool Grup, Shandong Paper Making Machinery Factory, Double Star Tyre Rubber Factory, and the railway departments. The oil cylinder and components have also satisfied our customers in the USA and Europe.