Embrace this time-honored remedy. In addition to relieving stress, Chinese Health Balls, also known as Baoding Balls are known to improve joints, blood circulation, sleep patterns, and memory. Two or more Baoding balls are rotated repetitively in the hand to improve manual dexterity and strength, and they are also said to assist in injury recovery. Each ball measures just a bit under 1.5 inches in diameter and features a chrome rainbow iridescent color. Beautiful decorated box included. *Boxwill be Random Colors* includes 2 balls in a beautiful box Balls have a soothing chime inside.