Hang stunning decors at your birthday party, baby shower, or anniversary with our Balloonify Pink Mylar Number 4 Balloon. To perfectly pair with other Balloonify number and letter balloons, this mylar number balloon is shaped into a number 4. Made from mylar, this party balloon endures moisture and stays away from substances. Plus, this birthday number balloon is durable enough to reuse as many times as you'd like. This number balloon is self-sealing to provide an easy way to inflate and deflate. For your convenience, you can effortlessly inflate this using a hand pump with either air or helium. The aluminum pink foil finish creates a fun dreamy paradise atmosphere for your special occasion. This foil balloon is perfect for hanging on walls due to its built-in hanging loop. This helium number balloon measures 16 inches in length. To reuse these balloons, 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) sold separately.