Elevate your stylish party with our Balloonify Black Mylar Letter B Balloon. With its letter B design, this party balloon can be easily paired up with other Balloonify numbers and letters making it ideal for your birthdays and special events. This moistureproof graduation balloon is made from durable mylar that can be used repeatedly and is not affected by humid conditions. With its self-sealing design, this birthday balloon avoids air leakage. This black mylar balloon can be inflated with a hand pump, so you won't have to deal with the hassle of doing it yourself. Easily inflate this graduation balloon with helium or air. Featuring an aluminum black finish, this helium balloon provides a glossy touch at your events. Equipped with hanging loops, this custom balloon can be hung on any hard surface. This reusable happy anniversary 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) is available and sold separately.