Item Type: Wrist BallProduct Material: ABSProduct Specifications: Black With LightsProduct Use: Fitness Grip BallProduct Size: Approx.Height: 55mm / 2.2inDiameter: 70mm / 2.8in<br> .wang-edit-text{<br> font-family:Arial<br> important;<br> }<br> .wang-edit-text table {<br> border-top: 1px solid<br> 000;<br> border-left: 1px solid<br> 000;<br> }<br> .wang-edit-text table td,<br> .wang-edit-text table th {<br> border-bottom: 1px solid<br> 000;<br> border-right: 1px solid<br> 000;<br> padding: 3px 5px;<br> }<br> .wang-edit-text table th {<br> text-align: center;<br> } 1Function: Good for promoting blood coordination and circulation, strengthening fingers, wrists, forearms, shoulders and biceps. 2Portable Lightweight: This gyroscopic hand ball is small and lightweight, can be carried with you, no burden, convenient to exercise anytime and anywhere. 3Injury Rehabilitation: It is very suitable for the rehabilitation of hand injuries, such as carpal tunnel, gout, rheumatoid arthritis, osteoarthritis, fracture, subluxation, dislocation, sprain and strain. 4Endurance Improvement: Impressive warm up equipment improves the endurance of fingers and ligaments, and strengthens hand strength. 5Safe: Special wrist rope for protection and safety. Put on a special wrist rope when using it so that it will not be thrown out due to too much force when playing, which is safer.