300 Gram Weather Balloon

This is a new and unopened 300 gram weather balloon. It is sealed in an airtight package. The label shows an "MZZ" date of 04/10 and a Cure Date of 02/10. It expired in 04/2012. Uninflated it's roughly oval shaped and measures about 36 inches across and 50 inches tall. It was acquired from military surplus. It is in perfect condition. It is a white/natural color.

Balloon  Characteristics  (Sounding Balloons with Payload of 250 grams)

Ballooon Size (grams)	300
Diameter  (ft. @ Launch)	4.1
Volume  (cu.ft. @ launch)	36
Rate of Ascent (meter per min.)	320
Diameter (ft. @ burst)	13
Burst Altitude (x 1000 ft.)	82
Free Lift (grams)	560
Nozzle Lift (grams)	810