SummaryRubber cupping jars are flexible and powerful, negative pressure(vacuum).Can be used while on the go.Do not impede movement.Natural rubber guarantees durability, long use and easy care.Can easily change shape and make it possible to control suctio.Cupping works wonders for respiratory disease, menstrual disorders, etc.4Pcs Cupping Therapy Vacuum Massagers Acupuncture Rubber Cupping s:Cupping is a form of Traditional Chinese Medicine that has been practiced for over three thousand years. It involves creating suction against the skin with the use of cupping tools; usually along the bodys meridians (the energy channels according to Traditional Chinese Medicine.) Cupping works wonders for respiratory disease, menstrual disorders, digestion, headaches, dizziness, and lymphatic blockages.Lot's of Hollywood film stars are fascinated by this type of Chinese Medicine Therapy and making highly compliments.Specifications:Material: Silicone RubberMain Colour: BlueSize: Extra-Large Cup - approx. 7.5*7.8*6.6cm/ 2.95*3.07*2.59inchLarge Cup - approx. 5.7*6.1*5.1cm/ 2.24*2.4*2.01inchMedium Cup - approx. 4.5*4.9*3.9cm/ 1.77*1.93*1.59inchSmall Cup - approx. 3.3*3.7*3.1cm/ 1.29*1.46*1.22inchPackage Included:4 x Rubber Cupping Jars