This 12-Piece Deluxe Cupping Set is a unique way to relieve sore and aching muscles. The cupping method stems from traditional Chinese medicine, but its effects can be enjoyed in a variety of ways. Simply place one or more cups directly onto the skin, attach the tubing to the top opening of the cup and to the hand-held pump, and then pull the pump trigger to create suction. The tubing may be detached and the cups will still remain attaching on the skin by the vacuum. Acu-Points centered within the cups provide addtional stimulation against the skin. Measurements: Set includes two cups of each of the following inside diameters: 0.625, 1, 1.25, 1.625, 2, and 2.25 inches. Material: Cups are ABS plastic. Color: Cups are clear. Note: Read instructions before use.