39" Silver 4D Orbz Mylar Foil Balloons 4 Pack eFavormart Supershape Foil Balloons Shivoo Event Hire Birthday Balloons Super shape foil The Balloon Stop Hot Air Balloon Foil Supershape Balloon Shop 10,000+ Party Products. Silver Foil Helium Balloon in Number 4. Includes self sealing valve to gas from escaping after it's inflated. You can inflate this balloon with a helium Inflator or with air using a balloon air Inflator. SIZE AND MATERIAL: Inflated Size 34" (86cm) Foil Balloon OTHER INFORMATION: Price includes helium inflation. When cared for correctly, this balloon is refillable so can be used more than once. Party Town supports the responsible disposal of balloons to protect our environment.