Ball and Ring Apparatus
SKU: SB07985BNC
S$39.00Price
Excluding Sales Tax
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Brass ball, 3/4 in. diameter, fits into brass ring. Ball passes freely through ring when both are at same temperature. After application of heat, as little as 100° C change in temperature, the ball cannot pass through the ring until it cools or until the ring is heated.
Wooden handles.
