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Hand Generator
$14.99 $13.99 -
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Gasoline Engine Model
$19.95 -
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Premium Spectrum Tube, Standard Length, Xenon Gas, 26cm
$19.95 $17.79 -
Replacement Bulb for Planck's Constant Apparatus
$18.75 $12.95 -
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Pascal's Pressure Sphere
$17.95