Describe Colors:blue and green Size:6*6*6cm net weight:110g Product functions and features include: 1.Strengthen hand strength: Grip ball is an effective rehabilitation training tool that can help strengthen hand muscle strength, improve grip strength and hand flexibility. 2.Prevent hand injuries: By using grip ball for training, you can prevent hand muscle and joint injuries and improve the hand's resistance to injury. 3.Improve hand coordination: Grip ball training can promote hand coordination and flexibility, and help improve the fineness and accuracy of hand movements. 4.Relieve hand fatigue: Grip ball training can also help relieve hand fatigue and tension, promote blood circulation, and improve hand comfort. 5.Convenient and easy to use: Grip balls are usually small and easy to carry, and can be trained anytime and anywhere, which is very convenient. How to use: Grip balls usually have different elasticity and resistance levels. Choose a grip ball that suits you according to your personal situation.Place the grip ball in the center of your palm, and use the strength of your fingers and palm to hold the ball tightly so that the grip ball is squeezed.Slowly squeeze the grip ball, maintain the pressure for a few seconds, and then slowly relax your hand to let the grip ball return to its original state.Repeat the squeeze and relax movements. The number of repetitions per set depends on personal situation and training purpose. It is generally recommended to train for 10-15 minutes each time.The elasticity level of the grip ball can be adjusted as needed to gradually increase the difficulty and intensity of training, but avoid excessive force that may cause hand fatigue or injury. It is recommended to consult professional medical personnel or rehabilitation therapists before starting to use the grip ball for rehabilitation training to understand the training plan and precautions that are suitable for your situation.