RR-C-901 Cylinders, Compressed Gas: Seamless Shatterproof, High Pressure Dot 3Aa Steel, And 3Al AluminumThis specification provides the acquisition requirements for the purchase of empty compressed gas cylinders to be used for storage, transportation and distribution of high pressure liquefied and gaseous industrial and medical compressed gases including air, argon, carbon dioxide, helium, hydrogen, nitrogen, oxygen, sulfur-hexafluoride, and other gases.