• Brass ball and ring mounted on independent brass rods
• Sleek wooden handles for safe, comfortable use
• Demonstrate thermal expansion
• Economically priced
• Great for students

This unit, comprised of a brass ball and ring, each individually mounted on a brass rods with comfortable wooden handles, is used to demonstrate and observe properties of thermal expansion. The ball will pass through the ring while cool, but once heated it will now. Ideal for classroom demonstrations.