Product Name: Number Balloons Material: Aluminum film Color: Rose Gold Size: about 40 inches How to Properly Use Aluminum Foil Balloons Step 1: Find the Self-sealing Valve Step 2: Use Air Pump or Straw to inflate them Step 3: Can be reused,use the straw to deflated balloons after party end OCCASION: Wedding Party, Birthday Party, Bridal Shower, Christmas Party, Anniversary Party and so on PACKACKAGE INCLUDES: You will get 1 pcs Flat Size 40 Inch Number Balloon HIGH QUALITY: Our balloons are made of high-quality Eco-Friendly aluminum foil, which is harmless and safe, non-toxic and reusable.the shape is beautiful, the surface smooth and bright , easy to inflate and deflate.when it's filled with helium, It can floats SELF-SEALING VALVE: Our balloons could SELF-SEALING after inflate,NO need additional operating.which is convenient and efficient to use PACKACKAGE INCLUDES: You will get 1 pcs Flat Size 40 Inch Number Balloon WIDE APPLICATION: Great for parties and events, perfect for birthday,anniversary,wedding,graduation,memorial ceremony,class and school activities, advanced photography day, New Year's Eve, and other party supplies. Make your party fashionable and exciting TIPS: Please don't inflate too much, it better to inflate gas about 90%. Self-Sealing helps the balloons maintains for nearly 1 week without leaking air