Yangzhou Sunzo Spring Ind. Co., Ltd was located in Yangzhou which is the base for manufacturing and researching disc spring. As a professional manufacturer and exporter in disc spring, Sunzo spring focus on researching and developing in disc spring since the company was established in 1998, and had passed ISO9001:2008 certificate in 2009. we effectively combined products manufacturing with customers’ requests, and quality controlling with credit figuring. We successfully est-ablished the model of double win with our customers by endless pursuing splendid quality and service , At present , we have established long term cooperation relationships with our America, Europe and Australia customers , and they had been becomed our most important foreign markets. We produce according to DIN 2093 specifications for applications which require high quality precision disc springs. Our conical spring washers are produced according to DIN 6796. Welcome to contact with us for further information! Sunzo willing to grow with you together.