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What are these marbles made of?
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Glass
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What size are the marbles?
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16mm or 5/8 inch
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25mm or 1 inch
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How do I tell what size marble I need?
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If a dime placed on edge fits into the hole for the marble, you want 16mm or 5/8 inch marbles.
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If a quarter placed on edge fits into the hole for the marble, you want 25mm or 1 inch marbles.
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