Create special occasions customized messages like "Sweet 16" or '50 Years" with our Balloonify Blue Mylar Number 0 Balloon. Shaped like the number 0, this party balloon is compatible with our other Balloonify number and letter balloons. This number balloon is made of mylar and can withstand humidity and heat for a long time. By deflating and inflating it later, you can reuse this durable birthday balloon for many occasions. This metallic balloon has a self-sealing valve that ensures no air or helium leaks out after inflating. A hand pump can be used to inflate this mylar balloon. This graduation balloon's blue finish adds a touch of elegance to your party space. Using the built-in hanging loops, you can easily hang this custom balloon. Measuring 40 inches in length, this moistureproof 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.