This Birthday Exploding Blocks 18" Foil Balloon from Pioneer Balloon Company is the perfect addition to your birthday party. This 18" balloon is two-sided and made by Qualatex, a trusted name in balloons. The balloon is self-sealing and easy to use. With its bright colors and fun design, this balloon will be a hit at your party. Add a festive touch and brighten up your birthday with this Birthday Exploding Blocks 18" Foil Balloon.