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

Usually, the delivery time is 7-14 days, and the delivery time estimated on the web-page is not accurate. When performing inflation operations, it is necessary to ensure that there are no sand or any other sharp objects around.- Professional Weather Balloon by Hwoyee, designed for meteorological investigations and aerial video. - Suggested Inflation Volume of 2.2-2.8 m³, Net Lifting Force=1120g, Total Lifting Force=1970g, Bursting Altitude=28000m/92000ft. - Natural color close to white, with Neck Length of 12-15cm and Neck Diameter of ≤5.5cm, Body Length=190～220cm. - Ideal for fairs, aerial photos, meteorologists, science projects, and grand openings. - Requires helium for floating or hydrogen for greater lift near the ground. Helium can be purchased locally, while hydrogen filling is recommended in laboratories for safety., Manufacturer: Nballoon.com