Value Pack-2 Pieces 40 Inch Silver number Balloons: No.5 Silver number balloon + No.0 Silver number balloon.Each set of number balloons comes with a straw to help you inflate each number and a long ribbon (random color). Premium Quality Foil Balloon: Our premium quality balloons are crafted with a durable, ultra-shiny aluminum foil that maintains form without leaking or losing air, strong and auto-seal. Easy Use: The number balloons are fast and easy to inflate using the plastic straw included in the package. Occasion: Large number 50 balloons is perfect for 50th birthday anniversary party decorations. Everything you need to celebrate special moments and build great memories with family and friends. Note: Please avoid filling more than 90% of air or helium.If it is over-inflated,it can easily cause the balloon to explode at high temperatures.You can reused the foil Mylar balloons.