Qingdao Tongshuai Group is one of the most professional and largest packing enterprise in china, which specializes in producing flexitank that are popular in Transportation industry. With total assets of USD$4.5 million and a factory size of nearly 40, 000 square meters, not only do we have high-tech mechanical equipments and first class production line, but also we are proud of a group of advanced engineers, technicians and workers 1. we passed America Railway Impact Test (COA rail impact test ). Now There are only 4 companies passed it in china. 2. $5000, 000 insurance from America Chubb insurance company. 3. FDA, HACCP, ISO9001, Approved. 4. all are Food Grade Flexitank. Adopting our own safety designs, like Anti-suction Valve, two heat seal lines etc.