This item is not only hands massage ball, but also a kind of stress relieve balls. You can play with it when you feel bored. It can help you spend time and relieve stress. Handball in the rotation will massage the fingers, pressing acupoints in your palms. Features -Color:Assorted Color -Material:Marble -Size:3.50X3.50X3.50cm/1.38X1.38X1.38in -Note: There is a certain color difference between different batches. -Made of premium marble material, this round hand massage ball is easy to carry and store -Massage ball help relieve muscle tension, stress related to pain, tightness, muscle injuries -Greatly relieve the pressure and discomfort in your hand. This habit will make your hand healthier -Very simple but effective massage balls. Perfectly held in your hand and to the muscles -Also an excellent substitute and complement to massage or physical therapy sessions Package list: 4 x Balls