Perfect decompression ball: Whether you are looking for an anti-stress toy or manual re-education, Peradix's anti-stress ball is perfect, whatever its compression, it returns after using clean for a long time immediately back to their original state with clean water and reuse. Contains no harmful additives 100% high quality thermoplastic rubber compound, without adding other toxic substances, because it has no harmful taste, thanks to PAHS, ROHS and other chemical certifications , suitable for children, don't worry about any problem Humanized Humanized design: the size of each ball is 58mm x 43mm, egg ball shape, easy to hold in hand. The surface of the ball is textured, slightly rough to prevent slipping, suitable for children and adults. Hand rehabilitation ball: As the ball has three different levels of difficulty, soft, medium and hard. Therefore, it is also suitable for manual exercise, especially for PC workers who need to relieve wrist pain caused by osteoarthritis, or for a long time to improve finger flexibility and wrist relaxation. The Perfect Gift: The hand exercise ball is small in size, light in weight, easy to carry and suitable for your pocket. It is suitable for a wide range of people. You can use it in the following places: fitness, physical rehabilitation, rock climbing, these are men and women regardless of age and gender