Materials: Silicone Size: One size Color: Four colors 1. Muscle training: Using a silicone grip ring can effectively train hand muscles and strengthen hand strength. 2. Active hands: By using the grip ring, it can help the hands to engage in a variety of activities, promote hand flexibility and coordination. 3. Rehabilitation training: The grip ring is suitable for rehabilitation training and can help rehabilitation patients to regain hand function, improve hand flexibility and strength. 4. Grip strength training: Using the grip ring can effectively train hand grip strength, improve hand gripping ability, and help enhance sports performance. 5. Silicone material, compact and portable: The grip ring is made of silicone material, compact, lightweight and easy to carry, allowing for training anytime, anywhere, convenient and practical. Package includes: 2pcs Silicone grip ring