... inch valve 4. Airvent(optional) HENGXIN Flexitank is designed for the transportation of non-hazardous material in 20 ft containers. Its formed ... Wood Oil,Glycerol,Coconut Oil, Synthetic Resin, Cleanser, Disinfector, Surfactant, olyalcohol, Silicate, Glycol, PG, Fertilizer, Natural Latex, Synthetic Latex, etc,. flexitank for liquid transportation