Add a pinch of charisma with our Balloonify Silver Mylar Letter U Balloon. This custom balloon in the shape of the letter 'U,' is pairable with our other Balloonify letter and number balloons. The durable mylar construction makes this party balloon moistureproof, promising a long float life. Plus, this metallic balloon is reusable. This mylar balloon's valve seals itself once the pump is removed to stop air leakage. The easily inflatable form of this graduation balloon lets you fill it using a hand pump. Featuring an aluminum silver foil finish, this letter balloon is a perfect addition to your silver-themed party. To enable this birthday balloon to be hung from ceilings or walls, it is designed with hanging loops. Measuring 16 inches in length, this foil balloon can be inflated with air or helium. 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) is available and sold separately.