Our new storage tanks are lightweight and come in three sizes:  437 cu ft @ 4500 PSI/310 bar;  471 cu ft @ 5000 psi/345 bar; and  510 cu ft @ 6000 psi/414 bar. These tanks can be filled and transported across most of the world's borders. All cylinders have a 10-year hydro test interval and come with 25E valve inlet threads. Designed under specification ISO 9809 - 2:200 - Parts 1 & 2, and are DOT-qualified. Optional TC stamp for Canada.