American Educational Ball and Ring Demonstrating Thermal Expansion - La Contesa Prime-Line Products FM 1820 Spiral

Prime-Line Products FM 1820 Spiral Non-Tilt Balance

Set includes 3 versatile brushes Perfect for proper cleaning of glassware

14792 oz Pure Silver

extra weight backpack

This boldly colored

American Educational Ball and Ring Demonstrating Thermal Expansion - La Contesa Prime-Line Products FM 1820 SpiralAmerican Educational Ball and Ring Demonstrating Thermal Expansion Brand: American Educational The unit demonstrates the expansion of metal when heated and its contraction when cooled When either the ball or ring is heated, the ball will not pass through the ring When cooled, however, the ball will pass through the ring freely The ball and ring are mounted on insulated wooden handles to protect hands from the heat