Add a touch of glamor to your parties with our Balloonify Black Mylar Number 1 Balloon. With a number 1 design, this can be added with our other Balloonify numbers and letters, making it perfect for birthday parties or anniversaries. Crafted from mylar, this number balloon is top quality and moistureproof to ensure that its float life is not affected by humidity. For use at multiple catered events, this birthday balloon is durable and reusable. With a self-sealing design, this party balloon won't allow air to escape. To avoid the hassle of inflating it yourself, this balloon decoration can be blown up with a hand pump. This graduation balloon can be expanded with helium or air. Featuring an aluminum black finish, this helium balloon gives your events a chic, and modern look. Built with a hanging loop, this custom balloon can be hung on walls or ceilings. This anniversary 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.