18 balloons, Rose gold number 18 foil mylar balloon 16" inch number balloons, Large number 18 balloons is perfect for 18th birthday , anniversary party decorations. 2 Pieces 16" Inch rose gold number balloons: No.1 rose gold number balloon + No.8 rose gold number balloon . 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. 18th birthday decorations for girls foil balloons is a must for creating a beautiful 18 birthday photo booth props. This 18 birthday decoration items is unique and it can be filled with gas or air. This 18 birthday balloons can be use with 18th birthday decorations with banner with 18 foil balloon. Birthday decoraion for girls 18th birthday is very beautiful.