The Haci Cupping Set combines acu-pressure, bio-magnetic, and cupping therapy in a single synergistic treatment. Each cup contains a powerful 0.3" diameter magnet, color-coded red bionorth (-) or blue biosouth (+) that contacts the skin during use. 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".