FIROMI 25 Number Balloons Silver Big Foil Mylar 52 Balloon Numbers 40-inch | Giant Jumbo Inflatable 25 or 52 Balloons Numbers for 25th or 52th Birthday Party Anniversary Decorations

? Choose Them: The Silver number balloon is made of high-quality aluminum film that empty balloon is 42 inches,after filled with helium or air,it’s 40 inches. 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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