everything is 39.99

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stirlingkit

Stirling Engine Kit DIY Assemble Physical Motor Model Power Generator External Combustion Educational Toy

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$29.99
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$29.99
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stirlingkit

Stirling Engine Kit DIY Stirling Motor Generator Model External Combustion Engine Educational Toy

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$39.99
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$39.99
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stirlingkit

Stirling Engine Kit with Electric Generator Hot Air Physics Science Kits Educational Model Toys

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stirlingkit

γ-shape Hot-air LED External Combustion Stirling Engine Model

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$39.99
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$39.99
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stirlingkit

γ-Type Golden Single Cylinder Sterling Engine Generator Stirling Model with LED Diode and Bulb Science Experiment Educational Toy

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$39.99
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$39.99
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