The object KUGELSPIRALE is our classic. Designed in 2004 by a German artist and designer and traveled around the world. Best optical crystal glass paired with the best stainless steel realize here a huge illusion that will last forever. A brilliant optical illusion. A physical rotary pendulum and physical toy. The object is hung on the supplied nylon thread. The model number indicates the diameter of the sphere in millimeters. The length and weight of the object can be seen in the detailed description.