These compasses can slide on watches, wristbands, and straps up to 3/4 inch (20mm) wide and 1/8 inch (3.1mm) thick.
Each compass is 3/4 inch (20mm) in diameter, is liquid filled and has easy to read UV reactive ink.
Great for camping or outdoor science experiments. These can also be used indoors in a classroom or home setting.
Included: set of six (6) compasses.
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