The 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 handle. Instructions included.Ball and Ring Apparatus designed for demonstrating the principles of thermal expansion in educational settings.Hands-on demonstration tool that visually illustrates how materials expand when heated and contract when cooled.Durable construction with a metal ball and ring mounted on a sturdy handle for repeated classroom use.Ideal for physics lessons, helping students understand thermal properties and material behavior under temperature changes.Simple yet effective design makes complex scientific concepts accessible and engaging for students of all ages.

WARNING: This product can expose you to chemicals including lead and nickel, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to .

Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.