Let your party decor be phenomenal with our Balloonify Silver Mylar Letter O Balloon. Fabricated in the shape of the letter "O," this helium balloon is used with our other Balloonify letters and numbers to create personalized messages. This balloon decoration is made from mylar and is highly durable for reusability. Plus, this party balloon is moistureproof to increase its float life. To let you create striking decorations, this mylar balloon comes in a silver finish. With a self-sealing design, this foil balloon stays in the same shape and size, restricting air or helium leakage while in use. Use this letter balloon to adorn your walls using its built-in hanging loop. Measuring 40 inches when inflated, this happy anniversary balloon can be filled with the help of a pump. 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.