Our company has the manufacture licenses of pressure vessels for grade B1,B2,B3,D1 and D2, as well as perfect quality control system. This product is featured in high safety, low weight-capacity ratio, good low temperature tenacity and fatigue resistance, it can be widely used in car,bus and truck.The safety technical index have reached a leading level both in China and in the world with being approved by ISO9001:2000,ISO/TS16949:2000,DOT,BV,TUV,and TC. The cylinders have been awarded quality prize,provincial famous brand and famous trademark at the Provincial and National Level. The brand "MENGLING" has been awarded as" china Famous Trademark". These cylinders are insured for product liability by PICC Property and Casualty Co. Ltd.