Premium finger trainer in 3 HARDNESS LEVELS - The egg-shaped grip ball has three levels (red 30 pounds, yellow 50 pounds, blue 60 pounds). Fits hands of different size and strength, you can choose according to your own situation. Is the best choice for decompression, recovery and training of finger strength and flexibility. Ergonomic Shaped - Thanks to the scientific oval egg design, this hand trainer fits your hand perfectly. The surface of the finger trainer is slightly roughened and thus prevents sliding around and increases the comfort and the training effect. The egg-shaped grip balls are washable, easy to keep clean and hygienic. Environmentally friendly and durable - The egg-shaped grip ball is made of environmentally friendly thermoplastic rubber (TPR). It is non-toxic and safe, uniquely designed for long-term and frequent use. Safe, environmentally friendly and even more durable. Versatile and Versatile - You can use these egg-shaped grip balls to reduce stress, strengthen hands, fingers and forearms, increase finger flexibility and prevent arthritis. Suitable for people of different ages and professions, also ideal for athletes, climbers, office workers and pianists. Small and Portable - This lightweight and small hand exerciser is very portable. You can take them with you anywhere and exercise your hands and fingers anytime, anywhere. Product information Increased hand strength: Thanks to the three different degrees of hardness, you can effectively improve your hand and forearm strength as long as you insist on training. Increased Finger Flexibility: Great choice for anyone looking to improve finger mobility or use their fingers. For example PC users (programmers, writers, students) - musical instrument players (guitarists, bassists, pianists and violinists). Relieved: Since our balls are made of silicone, they offer strong resistance and, thanks to their texture, are comfortable to hold. You can completely relieve and transfer your pressure by firmly squeezing the egg-shaped handle balls. Joint Disease Prevention: Frequent finger movements can increase the mobility of the fingers, avoid stiffness, relieve joint pain and promote blood circulation in the hand, effectively prevent arthritis. Specifications: Material: thermoplastic rubber (TPR)Size: 2.2 inches x 1.5 inches Weight: 45g Resistance: red 30 pounds; Yellow 50 pounds; Blue 60 pounds Package include: Egg-shaped handle balls 3pcs