When these two one-pound steel balls collide, the impact generates enough heat to burn a hole in a piece of paper. Your students will not forget this spectacular transformation of mechanical energy into heat energy. The balls are 2" in diameter.
Our products are not toys. Use in a laboratory or educational setting only. Not for children 13 and under.
California Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.