Material:Foil Color: Pink，BlueQuantity: 13 Pcs BalloonsSpecification :16 inch， length about 40cm (uninflated) Features:1. made of foil， uniform color， ball pretty2. can be used repeatedly， easy to charge and discharge gas (can be deflated with a straw)3. self-sealing， pinch the seal directly after inflating4. This balloon either hydrogen or helium filling will not float， not fly. What You Get:1 Set x "HAPPY BIRTHDAY" Balloons