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  • Original price $9.99 - Original price $9.99
    Original price $9.99
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    Current price $14.95

    Radiometer

    In stock

    A what? Radiometer is just a fancy name for this Solar Engine. It demonstrates the principles of energy conversion and shows how heat and mechanica...

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    Original price $9.99 - Original price $9.99
    Original price $9.99
    $14.95
    $14.95 - $14.95
    Current price $14.95