300g Weather Balloon

hwoyee professional huge balloon designed for meteorological investigations and aerial video recording.
– suggested inflation volume of 1.5-1.8 m³ for a 300g balloon, offering a net lifting force of 810g and total lifting force of 1360g.
– natural color resembling white, with a neck length of ≥10cm and diameter of ≤6.4cm. The body length measures between 135-160cm.
– iIdeal for fairs, aerial photos, meteorologists, science projects, and grand openings.
– can be filled with additional helium or hydrogen gas for increased lift near the ground. Note: Hydrogen filling should only be done in a laboratory due to safety concerns.