1Made of high quality polyurethane fiber material, waterproof and oil-proof, to keep the ball elastic. 2Using TPR soft rubber, springback and good wear resistant, safe and healthy without peculiar smell. 3Great for palm acupoint massage/hand grip exercise/finger joint movement. 4Small size and lightweight, easy to carry and store, can carry it in your pocket, convenient to use. 5Can effectively stimulate the palm of each point, promote blood circulation, grasp strength exercise, finger joint activities to exercise health care effect.
