DescriptionSold: Single Approx size: 86cm / 34 in Material: Foil Helium Cubic Capacity: 0.04m³ This balloon seals itself. This balloon can be filled with helium OR air! Requires helium gas inflation for a floating effect. Combine this item with other letters or numbers to create a message or a name. Air-filled balloons stay grounded and make wonderful additions to balloon arches or displays without the use of helium. Helium gas cylinders, ribbon and balloon weights sold separately. Balloon delivered flat.