Features: 1.Suitable for squeeze, stretch and pull with no odor, no stains, no edges, no noise. The nonslip rings are also tear and crack resistant for long-term use. 2. Perfectly sized for grip strength training for men, women, seniors and teens. The stress relief rings offer resistance and fills your hand. 3. Strengthen your wrists, improve the dexterity of your fingers and increase the strength your hands can apply while reducing fatigue. Its rally value is from 30 to 50 lb. Help balance your grip muscles and your expanding muscles. 4.Perfect for rehabilitation therapy, fitness and relaxation, more forearm Muscularity. Hand grippers can also help with pain or prevent arthritis relieve symptoms of tendonitis and rheumatoid arthritis and aid recovery from a fracture of the hand. 5.Ideal for athletes(tennis, basketball, boxing, golf and shooting)and musicians (guitar players, bass players, pianists and violinists). Portable and easy to fit in bag or pocket. You can get repetitions in while driving, at the office or anywhere Specifications: Color:As picture Quantity:1PC Size:As Picture Shows Material: Silicone Package Include:1PC Hand Gripping Carpal Expander Note: 1.Please allow 0.1-0.3cm differences due to manual measurement, thanks. 2.Please understand because of the light irradiation or computer display difference, so I can't guarantee photos and real color is 100% the same.