Create spell-bounding decor with our Balloonify Black Mylar Letter I Balloon. Featuring the letter I, this mylar letter balloon pairs perfectly with other Ballonify numbers and letters for easy customization. The durable mylar construction of this birthday balloon makes it a great choice for outdoor parties because it is moistureproof. Reusable and durable, this party balloon can be used for multiple events repeatedly. Featuring a self-sealing design, this party balloon won't allow air to seep through. Easily inflate this balloon decoration with a hand pump. This graduation balloon is suitable for air or helium inflation. This anniversary balloon decoration can easily be hung anywhere with its hanging loop. With its aluminum black finish, this helium balloon provides a stylish touch to your events. 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.