Long Metal Coil Spring - Extends to 30 feet

This long metal coil spring is ideal for visually demonstrating wave properties, such as frequency, wavelength, and interference, in the classroom.  Can be used in a variety of experiments, and provides a hands-on teaching tool that students always seem to enjoy.  Extends to thirty feet in length, measures about 6.5" fully coiled.  Also makes a great gift for anyone who was or is a fan of the smaller toy version we all know from our childhoods.

Features:

• Metal coil perfect for classroom demonstrations of wave properties
• Great for many experiments, hands-on, a student favorite
• 6.5" fully coiled, 30’ fully extended