Features: Quality & Easy to Carry: It adopts the highly elastic PU material, which is lightweight and odorless. Easy to carry, enhancing the hand strength any times, any where. Ergonomic Design: Suitable for all age groups and fits well all hand sizes. Portable and easy to carry in your bag or pocket. Fitness & Sport Enthusiasts: Strengthen your wrists, improve the dexterity of your fingers and increase the strength your hands can apply while reducing fatigue. Rehabilitation & Preventionl: Great for arm muscle, tendonitis, tennis elbow or when you type, text or any other activities which use your gripping muscles. Strengthens Grip and Improves Dexterity: Hand exercise ball build strength in the fingers, hands, wrist and forearms. Applicability: It is widely utilized in the daily exercise and healthy care. Perfect for the elder, rehabilitation groups, the mouse hand, ladies, and so on. Specifications: Material: PU Color: Blue/Yellow Package Weight: approx.25g Style Options: 3 Style are Available as Shown in the Picture. Size: approx.7cm/2.75in (More Size Detail, Please See Photo.) Note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thanks! Package includes: 1Pc x Finger Grip Ball