Ball and Ring Apparatus. Educational Demonstration of Thermal Expansion. Case of 100.

GSC International 4-19801-CS Ball and Ring Apparatus. Classroom Case of 100. 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.  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 rep