Professional Weather Balloon For Meteorological Investigation Aerial Video Holiday Party Decoration Entertainment Toys Huge Balloons (240 inch/600g)

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• Hwoyee professional huge balloon,For meteorological purposes, the Suggested Inflation Volume of a 600g balloon is 2.2-2.8m ³, Net Lifting Force=1120g, Total Lifting Force=1970g, Bursting Altitude=28,000m
• Natural color close to white ,Neck Length12-15cm,Neck Diameter5.3-5.7cm,Body Length=190-220cm.
• If you are using it for other purposes, you can charge more helium or hydrogen gas to achieve greater lift near the ground.
• If need to fly,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).
• Ideal for fairs aerial photos,meteorologists, science projects and grand openings.