G-Shang Metal Corporation was established in year 2007 in Taichung, Taiwan. GSM obtained ISO9001 certification and started mass production in the same year. GSM, as a leading provider of high-pressure seamless aluminum cylinder and composite cylinder, has been devoted to designing and manufacturing high-pressure cylinders, and has acquired certificates from US DOT, EU TPED, Canada TC and Korea KGS, etc. The company designs and produces customized cylinders for customers, and distributes millions of cylinders globally every year.