| 1.0 | Shape | Sphere |
| 2.0 | Size | 4.00 ft/1.21 m diameter
3.14 ft2/1.17 m2 cross-sectional area |
| 3.0 | Material | 2 mil metallized polyester resistivity less than 5 ohm/square |
| 4.0 | Weight | Approximate 1 lb/450 grams to give maximum altitude of 24,000 ft. |
| 5.0 | Gore Design | 18 gores, sealed with thermoplastic tape |
| 6.0 | Volume | 33.51 ft3/0.95 m3 |
| 7.0 | Inflation Valve | 1/4 inch/6.35 cm metal with cap, diffuser and plastic tie loop |
| 8.0 | Relief Valve | 7/8 inch/26.67 cm designed for 20 inches of H20 super-pressure |
| 9.0 | Tolerances | Diameter to +/- 5 % |
| 10.0 | Quality Assurance | Balloons pressure tested at 20 in. H2O for 60 minutes |
| 11.0 | Packaging | Each balloon is wrapped in protective polyethylene cover, and packaged in a cardboard box |
