DescriptionHand exercise ball is known to improve joints, blood circulation, sleep patterns and memory. It is a kind of portable health care device. This hand exercise ball, not as easy as it might seem, yet wonderful stress relief after a busy day. It can be part of your meditation therapy.Features- Color: As Shown- Material: Lantian Jade- Size: 5.00X5.00X5.00cm/1.97X1.97X1.97in- It can greatly relieve the pressure and pain in your hand. This habit will make your hand healthier!- It is very simple but effective massage balls. Perfectly held in your hand and stimulated to the muscles.- This massage ball is also an excellent substitute and complement to massage or physical therapy sessions.- This product is known to improve joints, blood circulation, sleep patterns and memory.- You can play with this handball when you feel bored. It can help you kill time.