Feature: 1. High Flexibility: small size, light weight, high elasticity, hold your hand, effectively relieve stress and irritability, exercise finger strength, carry around, anytime and anywhere. 2. Rehabilitation Training: Daily hand exercises with this hand exerciser will help restore hand injuries, rheumatoid arthritis, arthritis, carpal tunnel, tendovaginitis, broken, broken wrists and tendon surgery. 3. Train Anytime: Portable and easy to fit in your pocket or bag. You can exercise your hand anywhere and anytime. 4. Comfortable and Durable: the soft hand amplifier is comfortable to hold. Suitable for small and large hands, seniors and teenagers. You can use it anywhere, anytime, super easy to use. Specification: Material: Elastic PU Size: Diameter: about 7cm Color: yellow Package List: Note: Due to the different monitor and light effect,the actual color maybe a slight different from the picture color.Please allow 1-2cm differs due to manual measurement.