This classic item is a great demonstration to illustrate wave properties. Holding the spring vertically demonstrates longitudinal waves when oscillated up and down. When two people hold each end and move one end up and down this visualizes a transverse wave. Made from PVC plastic.
Note: colors may vary. The overall dimensions is 3 ¼” in diameter and 2 ½” tall .Can safely stretch up to 8 feet.

• Demonstrate transverse and longitudinal waves
• Colorful design
• Stretches up to 8 feet long