Material: Number balloons for birthday party are made of high-quality aluminum foil, durable and reusable, non-toxic and harmless, will not explode or leak easily, no need to worry about scaring children. Easy to Use: Helium balloons can be inflated with air or helium and have a self-sealing port so they won't leak. The balloon has a hanging hole so you can place it wherever you want. Uses: Digital balloons are perfect for birthday parties, graduation ceremonies, Valentine's Day, company parties, anniversaries, dates, weddings, New Year's Eve, bachelor parties, or any other occasions. Gift: Digital balloons can decorate a great place gift for your friends, family, or company party, giving them a wonderful satisfying memory and experience. Package Includes: 1 x Number Foil Balloons, 40" Rainbow Digital Balloon and multiple numbers to choose from, feel free to combine any numbers. Warning: Do not use near air lines. Warning: Not suitable for children under 14 years. Use under adult supervision