Ningbo Cospl Pneumatic & Hydraulic Component Co., Ltd. Which is specializing in manufacturing series of nitrogen spring products for about ten years. Our company COSPL is an appointed foreign currency earner of Huaxin International Trade Corp. We have advanced automatic and semiautomatic production lines and test facilities. In addition to the technical support from Leiyan Pneumatic Springs Research Institute which is a top academic institute in China, the company adopts manufacturing technology of STABICUS and SUSPA in Germany. Ningbo Cospl Pneumatic Hydraulic Component Company is a capable of R&D in varieties of special pneumatic springs, one of which is patented (Patent No.200420209893� )by China State Patent Office.