Product Size: rally: 7.5 * 4 * 1.3 cmColor: green, blue, orangeMaterial: siliconePackage content:1 piece finger training device (6 pieces) 1. High Quality Design for Maximum Performance: Our grip exercise ring and finger resistance bands are made of high quality eco-friendly silicone, safe and durable, washable and longer lasting, not easy to tear. Can be used frequently and feel comfortable when you exercise your hand.2. Fitness & Sports Enthusiasts: Good addition to fitness equipment, ideal for Rheumatoid Arthritis, Arthritis, Carpal Tunnel, Tendonitis, Tennis Elbow.3. Rehabilitation and Prevention:When you are fit or work with the computer, the muscles of the hands are stretched or sprained accidentally. Then you need this training kit to recover your hands and fingers. And this training kit is perfect for improving finger and hand strength for athletes such as rock climbers, fitness, tennis, baseball, boxing, tennis, golf and shooting, and musicians such as guitarists, bassists, pianists, violinists, etc br />4. Ergonomic Design for All Hands: The strength trainer is ergonomically designed and fits well for all hand sizes and all ages, ideal for men, women, seniors and teenagers . They are portable and lightweight and can be found in every pocket. You can get replays anytime at home, work, walking, in the car or anywhere 5. Fitness and Sports Enthusiasts: Both the finger stretcher and the hand ring have 3 tiers. 3 kg for rehabilitation and beginners (for children and women and men), 4 kg for relaxation and computer workers (for women and men), 5 kg for grip workout and Athlete (for men).