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Thermal-Expansion-Set is a kind fashion product from Hema brand factory. As the manufacturer and supplier in China, we provide customized service and make newest and fashion Thermal-Expansion-Set in classy quality. Contact us for lastest selling Thermal-Expansion-Set and advanced items. Welcome to to place bulk orders. Low price can be discussed.

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Ball and Ring Apparatus

The Ball and Ring Apparatus allows for a visible demonstration of the principles of the expansion of metals. When the ball is heated it will not pass through the ring, but when cooled the ball passes through the ring freely. The Ball and Ring are mounted on insulated plastic handles to protect your hands from the heat. Instructions included.