Features: The hand exerciser is made of silicone, because it is soft, elastic and tear resistant, and can be used for long-time without damage. This hand exerciser can train your hands by promoting blood circulations, improving flexibility and strength, and relaxing muscles. This kind of gym bracelet is small and light, which is easy to store and carry when going-out or traveling. Suitable for men and women grip training. The hand exercise ring can enhance the strength of fingers, hands, wrists and forearms. It is easy to hold and use. It is designed with anti-slip points to make you feel comfortable. Each handle has 2 kinds of force, different colors have different strength, which is enough to meet your different needs. Great for athlete, musicians and patients. Specifications: Material: silicone Style: Pink 20 to 30 lbs/Green 30 to 40 lbs/Blue 40 to 50 lbs/Orange 50 to 60 lbs/Black-color 70 to 80 lbs Diameter: Approx. 8cm/3.15inch Thickness: Approx. 2.5cm/0.98inch Note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Hand Strengthener Grip Ring