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Spiral Marble Run
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A spiral marble run for standard 16mm marbles, has base to collect the marbles.
Great fun for kids or easily amused adults!
Don't have a 16mm ball??? Easily re-size the model percentage using the formula: (your ball+1mm clearance) divided by 0.17
Example for a 13mm ball: (13+1)/0.17=82.35%
Model Dimensions: 87.5x87.5x115.5mm (WxDxH)
Great fun for kids or easily amused adults!
Don't have a 16mm ball??? Easily re-size the model percentage using the formula: (your ball+1mm clearance) divided by 0.17
Example for a 13mm ball: (13+1)/0.17=82.35%
Model Dimensions: 87.5x87.5x115.5mm (WxDxH)
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