DescriptionHand exercise balls build strength in the fingers, hands, wrist and forearms while reducing stiffness and joint discomfort by stimulating blood circulation in the forearm and hand. Perfect for athletes, musicians, office staff and students, as well as those with arthritis, carpal tunnel and rehabilitation needs.Features-Color:Yellow -Material:PU -Size:8.00X8.00X3.00cm/3.14X3.14X1.18in -Soft, light and flexible toys are good indoor educational training toys for children. -Reducing stiffness and joint discomfortby stimulating blood circulation in the forearm and hand.-Exercise and strengthen hands, fingers, wrists strength so that relieve stress and muscle tension.-The hand balls retain their shape for extensive usability and are also tear and split-resistant.-Perfect for athletes, musicians, office staff and students, as well as those with arthritis, carpal tunnel and rehabilitation needs.