Make your party decor stand out using our Balloonify Silver Mylar Number 7 Balloon. Crafted into the shape of the number "7", combine this balloon decoration with other Balloonify numbers and letters to create unique backdrops. With a metallic silver finish, this birthday number balloon gives a rich look to your party. The self-sealing design of this helium balloon ensures it will stay in the same shape and size for a very long time. This helium-quality number balloon is made from mylar and is highly durable and moistureproof for longevity. With the provided hanging loop, this custom balloon can conveniently hang on the walls or ceilings. Fill this graduation number balloon with air using a hand pump to ease the inflation process. This custom balloon expands up to 16 inches and is reusable for multiple events. 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.