Our company has gained confirmation and certification of Shanghai Bureau of Quality and Technical Supervision. For ten years, our company has been engaged in processing assorted rollers used for printing, auto parts stamping and welding supported with modern workshop. We produce series of nitrogen springs using the most advanced manufacturing process and equipment. We provide high quality products with high cost performance in standard parts for moulds. German technologies are all carried out under strict control of ISO9001:2000 quality management system. In market environment with increasingly fierce competition, we stick to realistic and traditional principle to supply standard parts for moulds with high quality and high reliability. In this way, our products can always maintain superior features of service and product safety & reliability. Shanghai YunAn Rubber & Plastics Machinery Factory can meet customers needs of reliability, ...[More]y and service life. Therefore, design, production and experiment of nitrogen springs are done according to international industrial standard .