Anagram International HX Bubble Guppies Happy Birthday Packaged Party Balloons, Multicolor Great for parties and other special occasions Fill with helium Foil balloon - Excellent alternative for those with allergies to latex Self-sealing. Helium Volume: 0.46 cubic feet, Minimum Weight Requirement (in Grams): 0.017 Pounds, Maximum Elevation (in Feet): 8000.0 Easy instructions