Balloon and Kite Mapping Reel
110lb or 50lb-test Dacron line, pre-wound on an hoop winder.
Each reel is hand wound onto an "unbreakable" hoop reel. Line is wound with loop at the end, allowing you to "chain" together multiple reels to get way, way up there.
To learn more about balloon mapping, check out the open source documentation on the Public Laboratory website.
Buyers outside the US, Canada, EU, Japan, Taiwan, S. Korea please select USPS Priority International.