$100.00 (as of 12/01/2019 15:48 PST details )
Features:
- Our Ball and Ring Apparatus is a visible demonstration of the expansion of metals.
- When the ball or ring is heated, the ball will not pass through the ring when cooled, however, the ball passes through the ring freely.
- The ball and ring are mounted on an insulated wooden handle to protect your hands from the heat.
- Instructions included.
- Sold in a pack of 10.