<ul><li>The Wave Demonstration Kit comes with one long, narrow steel spring and one larger helical spring that are matched to give nearly equal amplitudes of reflected and transmitted pulses and waves</li><li>A string and instructions are also included</li><li>Snaky spring, helix slinky, and string</li><li>Comes in a 1lb bag</li></ul><br><br>The Wave Demonstration Kit comes with one long, narrow steel spring and one larger helical spring that are matched to give nearly equal amplitudes of reflected and transmitted pulses and waves. A string and instructions are also included.

GSC International SLINKYKT Wave Form Slinky Kit