flexible cup 90mm diameter come with flexible silicone tubing and barb adaptor using hydrogen gas focused on treating specific problem areas to achieve the best results. relieve pain and achieve optimal health. The H2 gas is then directed onto the targeted treatment areas where H2, will permeate the skin and is absorbed into the body’s system. This treatment reduces oxidative stress, protect cells and repairs damaged cells thus enabling the organs to recover and function at their optimal levels. Molecular Hydrogen “selective” antioxidant, which means it is able to target and destroy only the harmful reactive oxygen species, while leaving the beneficial ones alone. Further studies demonstrated that this h2 molecule is incredibly and uniquely effective for dramatically reducing chronic pain and nerve pain and it showed absolutely no negative side effects