Sphericon
thingiverse
A shape which rolls down an incline in a unique way. Made by taking 2 isosceles cones, cutting them in half along the altitude, rotating one side 90 degrees. For better description:http://en.wikipedia.org/wiki/Sphericon
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With this file you will be able to print Sphericon with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Sphericon.