Add a mystical touch to your event decor Balloonify Silver Mylar Letter I Balloon. With a letter I design, this letter balloon can be paired up with other Balloonify numbers and letters for a custom touch. Made from mylar, this letter balloon is moistureproof. Its self-sealing design makes sure there will be no air leakage, ensuring your balloon stays in shape. This giant letter balloon is suitable for air and helium inflation. With a stylish silver finish, this graduation balloon gives a classy touch to your ambiance decor. This reusable helium balloon can be inflated with air or helium according to your need. Built with a hanging loop, this balloon decoration is easy to hang on ceilings or hooks. This happy anniversary 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) is available and sold separately.