Bimetallic Jumping Disc

Was: $125.68
Now: $62.84
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SKU:
ZS872603
Condition:
New
Availability:
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A curved jumping disc??? The sky's the limit for these discs, which have two layers of bonded metals with different thermal expansion properties. A change in temperature causes these discs to jump approximately 12 inches in the air! Simple enough for elementary students; challenging enough for AP physics classes! 25mm (1 inch) dia. Pkg. of 10.