Foil balloon number 3 - 78cm
The package contains a numeric helium-filled foil balloon. Smart balloons use helium less than classic foil balls.
The height of the balloon is about 78 cm.
Properly filled and sealed foil balloon floats in the air for several weeks.
Foil balloons are sensitive to temperature changes (in the cool it shrinks, and in the warm it swells). Very hot air makes the helium swell, and the ball can burst.
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