Weather Wind Ballon 200 inch/500g for Aerial Video Holiday Party Decoration Entertainment Toys Helium-Filled Balloon Balloons

Weather balloons are large, helium-filled balloons that are used to measure atmospheric conditions such as temperature, pressure, and wind speed. They are typically made of latex or polyethylene and are equipped with instruments to measure the data. They are typically launched twice a day and can reach heights of up to 30 kilometers.

• Helium-filled balloon,500g,about 20ft/200 inch after inflation，Lift off altitude about 30000m
• With multicolorful and natural color , can be painted the color you want, easy to track or entertainment .
• Ideal for outdoors,travelings,meteorologists, science projects and grand openings.
• 200‘’ balloon approximately of items can be lifted (not accurate calculation, only approximate value, you need to measure it after you buy the balloon)
• These balloons must be filled with helium if they want to float up. You need to buy helium locally or fill it with hydrogen in a laboratory to ensure safety (dangerous, not recommended for ordinary people).