This lightweight disposable helium filled tank comes with an easy to use. Tank can fill approximately 50 9in latex balloons or 27 11in latex balloons or 27 18in Foil Balloons or 20 20in Foil Balloons. The number of latex balloons you can inflate depends on the size you choose to create. Tank holds approximately 149 cubic feet of helium and has a PSI of 260. CAUTION: contents are under pressure. Keep out of reach of children. Use this product only in well-ventilated areas. Do not fill this