350gram meteorological balloon

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• Brand & Model: HJ-350
• Neck diameter(cm):4.1~4.7
• Neck length(cm):12±2.0
• Weight(g):350+20
• Flaccid body length(cm):not less than 140
• Barely inflated diameter(cm): net less than 89
• Horizontal  diameter(cm)
• Burst diameter (cm):≥ 480cm
• Free lift(g):825
• Nozzle lift(g):1075
• Gross lift(g):1425
• Payload (g): min 250
• Average bursting altitude(km):26
• Rate of ascent:≥340m/min
• MOQ:1000 nos