Features 4 red bionorth (-) and 4 blue biosouth (+) color coded squeeze bulb plastic suction cups. Each cup includes a strong 2,300 gauss magnet. The 0.3" dia powerful magnet probe actually contacts the body during treatment providing a synergistically combined acu-pressure, biomagnetic, and cupping treatment. Use a skin lotion to enhance suction. Set of 8 includes 2 each of the following diameter cups: 0.5", 0.9", 1.1", and 1.3".