Fall in love with your decorations using our Balloonify Black Mylar Letter O Balloon. Shaped as the letter "O," put this helium balloon together with our other Balloonify letters and numbers to curate different words. Made from premium mylar, this custom balloon is reusable and doesn't rupture due to heat or moisture. The valve of this party balloon is self-sealing to avoid air or helium leakage. Easily place this letter balloon on any surface to dangle it using the built-in hanging loop. This foil balloon comes in a ravishing black finish for you to create stylish decors. Measuring 40 inches when inflated, this balloon decoration can be inflated using any 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.