Price for flat foil balloon not inflated. Add 2000 for inflated balloon
This 40cm letter balloon CAN'T float with helium, too small.
How to inflate DIY :
There is a small valve, inter the a straw in it and blow, after inflated full enough pull out the straw and press the valve, it will seal automatically.
On Changing temperature or after carry by motorbike sometimes they deflated a little. Inflate it again with straw.
Do not inflate too much, on out door area foil balloon will expend it self from the moisture weather.