New and improved design. Technique as developed by Dr. Manaka of Japan for Eight Extra Meridian and other special treatments. Proprietary, highly sensitive Germanium diodes within the connecting wires allow the body's potential current energy to flow only in one direction, thus balancing ionic flows and concentrations. The Manaka Cords with Grasping Leads attach easily to the acupuncture needle through the small spring-loaded handles. Approximately 78" long wire cords. Cord colors subject to change.