21 Number Balloons Gold Big Giant Jumbo Number 21 Foil Mylar Balloons for 12th or 21st Birthday Party Supplies 21 Anniversary Events Decorations

PERFECT SUITABLE FOR:gold 21 number foil balloons can both be used as number 12 and 21 balloons. They are the best choice for: 12th or 21st birthday party, wedding, graduation anniversary, holiday celebration, school class party, Halloween, Christmas and New Year party decoration. You can stick the gold 12 or 21 number balloons on the wall, window or door, you can inflate with both helium or air, you can even place them on the bed, floor or table, provide your party or home a good display.
PACKAGE CONTENTS: 2 Pieces 40 Inch gold number Balloons:No.2 gold number Balloon + No.1 gold number Balloon.
CHOOSE THEM: The gold number balloon is made of high-quality aluminum film that empty balloon is 42 inch, after filled with helium or air, it's 40 inch. Please use the straw in the balloon set to inflate it slowly.
TIPS FOR NUMBER BALLOONS: Due to the thermal expansion and contraction characteristics of aluminum foil, 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. Please avoid leaving the balloons in an outdoor high-temperature environment for a long time. If the ambient temperature is too low, it will also cause the balloon to deflate. At this point, you can use the straw to inflate again.
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