Make your next event stand out with our Balloonify Blue Mylar Number 1 Balloon. The number 1 design of this party balloon can be added to our other Balloonify numbers and letters to mark special milestones. Made from mylar, this balloon decoration is moistureproof and secure to avoid exposing guests to unwanted substances. To reduce your carbon footprint, this graduation balloon is durable and reusable. Designed to be self-sealing, this custom balloon keeps air locked in and won't easily deflate. This anniversary number balloon can be inflated with a hand pump so you won't get tired. Plus, they can be filled with either helium or air for your convenience. The blue finish of this helium balloon makes it perfect for baby showers, birthdays, and more. With a hanging loop, this big number balloon can be put up on walls or other high-to-reach areas. This air balloon measures 16 inches in length. 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) sold separately.