"High-quality materials: The hand rehabilitation ball is made of high-quality thermoplastic rubber, does not contain any toxic ingredients or unpleasant odors, is safe for children and adults, and you can use it with confidence.Textured surface: The hand rehabilitation ball is textured and slightly rough to prevent slipping, suitable for children and adults, and comfortable to touch. It is non-stick and can be cleaned with a wet tissue.Durable: The decompression hand trainer is of high quality and very tear-resistant. It will not tear after long-term use; the plasticity of rubber allows them to quickly return to their original shape after being squeezed, and will not tear. Twist and affect the appearance.Small and portable: The hand rehabilitation ball is small in size, easy to carry, and can be put in a bag. It can be carried anytime, anywhere, so you can use it at any time.4 resistance levels: There are four balls in the hand rehabilitation ball, each ball represents resistance, 15KG (yellow), 25KG (red), 30KG (blue) and 35KG (green). You can choose different resistance decompression balls according to your needs to exercise your fingers"