13.4l/22.3l disposable helium gas cylinder 1. 99.9% purity 2. Balloon gas, and leakage test gas 3.13.4l/22.3l 13.4l disposable helium gas cylinder 1. 99.9% purity 2. Balloon gas Helium is colourless, odorless, tasteless, non-toxic, inert, monatomic gas that heads the noble gas group in the periodic table. Itsboiling and melting points are the lowest among the elements and it exists only as a gas except in extreme conditions. Helium is the second lightest element and is the second most abundant element in the observable universe. Usages: 1. Helium is used as a shielding gas in arc welding processes on materials that at welding temperatures are contaminated and weakened by air or nitrogen. 22.3l/13.4l disposable helium gas tank