The PH0708A Helical Wave form Slinky is excellent for demonstrating wave motion.
*this is not a toy. It is way more awesome than that: it's a scientific instrument.
This is a Wave Form Helix that can be:
1) used as a scientific instrument to measure a wave function (it actually has a higher spring constant than the classic toy); or
2) unleashed down a wicked set of stairs.
Helical coil of flat section is made of tempered steel wire. Coil diameter 7.5cm length. Closed 10cm. Fully extended 3 meters.
WARNING
