The Balloon Time Helium Tank makes an excellent addition to any child's birthday party, holiday gathering or other special event. It features a convenient lightweight and portable design that makes it simple to use anytime, anywhere. This helium balloon tank holds 14.9 cubic feet of helium that is compatible with both Mylar and latex style balloons. It will fill up to fifty 9" latex balloons or twenty-seven 11" latex balloons while retaining a float time of around 5-7 hours. If you got foil balloons instead of latex, this disposable helium tank can fill approximately twenty-seven 18" or twenty 20" Mylar style balloons.