20 ft dia. Professional Weather Balloon, 600g

600g Professional Meteorological Weather Balloon, Project Aether brand. Diameter at release = 6 ft. Diameter at burst altitude = 20 ft. Volume at release = 50-100 cuft. Nominal Lift = 3.8 lbs. Maximum Lift = 12 lbs. Neck diameter = 2.8 inches. Neck length = 9 inches. Ascent rate = 1000 ft/min. Burst altitude = 100,000 ft. Material = Natural latex. Great for tethered and free-floating aerial photography projects. These are high performance scientific weather balloons and the normal inflation diameter is 6 ft on the ground. As the balloons ascend, they will expand to 30 ft in diameter and then pop. Be sure to wear gloves (soft gardening gloves, latex, or nitrile) at all times when handling the balloon. Also be sure to inflate the balloon on a soft cloth or tarp and keep the balloons away from sharp objects (including eye glasses or highly gelled hair) during inflation. * Highest altitude achievable and payload weight (e.g. 600g balloon: 100,000ft top burst height w/ <1lb payload, 4 ft diameter at release). * Highest recommended payload weight and altitude achievable at this weight (e.g. 600g balloon: 60,000ft burst height w/ 12lbs maximum payload (8 ft diameter at release). Visit www.ProjectAether.org for more details or to purchase an HD high altitude fly-it-yourself kit.