Ningbo Spey Scientific Cylinder Co., Ltd was founded in October 8,1998, which is the manufacture specialized in production of motorcycle cylinders in our country, located in Xiexi Industrial Park, in Daxie economic development zone, covering 20,000 m2 and fixed assets nearly 100 million. We are advanced in the technology of alloy iron casting, mould development and precision aluminum alloy die-casting in our country. Spey brand cylinder adopts the new resin bonded sand cast...