Celebrate in style with our Balloonify Black Mylar Number 5 Balloon. Made into the shape of a 5, this big number balloon pairs perfectly with other Balloonify number and letter balloons. Designed with durable mylar, this number balloon is moistureproof and a premium to ensure that your decorations don't deflate during wet weather conditions. Plus, this number balloon can be reused over time too. For a simple inflation process, this party balloon is self-sealing. You can also fill up this birthday number balloon with air or helium using a hand pump. Featuring an aluminum black foil finish, this helium number balloon easily blends with all kinds of decor. To compliment walls or ceilings, this mylar number balloon has a hanging loop. This foil 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.