• Includes 40-inch silver number 6 balloons, perfect for celebrations. • Made with high-quality aluminum foil, durable and unbreakable. • Can be filled with helium or air, staying inflated on the wall for more than 8 days. • Automatic sealing design for easy and safe use. • Suitable for all ages and genders, ideal for birthdays, anniversaries, and other celebrations. • Avoid inflating more than 90% to prevent breakage and keep away from heat sources.