Description

• Molded wheel having a diameter of 13cm consisting of 4 grooves of different diameters which are in the ratios 1,3,5 and 7.
• The wide and flat-bottomed grooves ensures and exact diameter for each groove, and to retain the cord each groove is having a small hole.
• To minimize the mass and inertia the back of the wheel is hollow and is attached to a rod which is 14cm in length.