1000 Gram Weather Balloon

Huge balloon,1000g,about 28ft/336 inch after inflation，Lift off altitude about 31000m
natural color close to white , can be painted the color you want, easy to track or entertainment.
Ideal for fairs aerial photos,meteorologists, science projects and grand openings.
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).