Provide a joyous party for your invitees with our Balloonify Rose Gold Mylar Number 4 Balloon. Pairable with our other Balloonify number and letter balloons, this number 4-shaped custom balloon is ideal to create customized messages. This party balloon's mylar construction provides durability and moistureproof properties, ensuring a long float life. The reusable design of this metallic balloon reduces the carbon footprint, making it sustainable. To avoid possible leakage, the sealing valve on this mylar balloon locks on its own once inflated. For maximum convenience, use a hand pump to inflate this graduation balloon. The rose gold finish on this number balloon brings a cute flair to every decoration. You can easily hang this birthday balloon from any surface with the built-in hanging loops. Measuring 40 inches in length, this foil balloon can be inflated with air or helium. To reuse this balloon, gently deflate, properly store, and carefully reinflate without overfilling. Shipped deflated in a 1 count box. This party balloon can be easily inflated with the included straw, providing you with full control to help eliminate the risk of over-inflation. Electric air balloon pump (SKU: RWP1061) is available and sold separately.