Add the Balloon Time Helium Tank to your party supplies. The Balloon Time Helium Tank is easy, portable and disposable. The helium tank hold 14.9 cubic feet of helium. Tank is non-refillable. Adult supervision required. Non-returnable. Latex Balloons: Tank will fill approximately (50) - 9 inch latex balloons or (27) - 11 inch latex balloons.The float time for each latex balloon is approximately 5-7 hours. Mylar Balloons: Tank will fill approximately (27) - 18 inch mylar balloons or (20) - 20 inch mylar balloons. The float for each mylar balloon is approximately 4 days. Please Note: This item can only be shipped via Standard Ground Shipping only. This item is not available for international orders, APO or FPO orders. Helium Tanks can only be shipped to a street addresss in the 48 Contiguous United States and cannot be shipped to Alaska, Hawaii or Puerto Rico. We apologize for any inconvenience. This item is also NOT returnable.