Product Description Size: 10*8cm Color: black Material: Silicone Package content: 6* tensioner 1.SAFE SILICONE MATERIAL 6 pieces squeeze finger therapy squeeze is made of high quality silicone material, which is odorless, BPA free and washable. 2.3 different resistance levels: the muscle strengthening training device is suitable for beginners. Your muscle strength will gradually increase with progressive resistance difficulty. We use different colours to distinguish the resistance:Light Grey (3 kg/6.6lb, Dark Grey (4kg /8.8lb), Black (5 kg/11lb), Light Green (3 kg/6.6lb), Dark Green 4kg/8.8lb and Green(5 kg/11lb). 3.Fitness Sports Enthusiasts: The exercise finger therapy squeeze can improve the wrists, increase the flexibility of the fingers, balance the muscles and expand the muscles while reducing fatigue. Ideal for osteoarthritis, carpal tunnel or even after a stroke. 4.No time and spatial restrictions: use it anywhere and anytime. The finger stretcher exerciser is small, practical and easy to carry. You can use it when walking, travelling (car, plane, bus), office, school, watching TV or any place you want to exercise. 5.Necessary for Exercise: The silicone traction device is easy to carry and use, can increase the strength of fingers, and is an essential small device for exercise.