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> Ball & Ring - Gravesand's
Ball & Ring - Gravesand's
Ball & Ring - Gravesand's
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$12.50
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In stock (5 available)
Part Number:
HL0200-001
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Specifications
Customer Reviews
Ball & Ring. This popular demo of metal expansion and contraction consists of a brass ball and ring mounted on steel rods with plastic handles. At room temperature the ball passes through the ring; when heated it will not. Includes instructions.
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