Enameled blue metal exercise balls to rotate in your hand for coordination and also to hit the pressure points on your hand that correlate to your major organs in your body. Instructions included. The enameled metal balls are 1 1/2 inches in diameter and come boxed in a set of 2. One of the balls has a Chinese Phoenix Bird on it and the other has a Dragon on a beautiful enameled blue background. The exersize balls make a slight jingle noise while you rotate them in your hands! Instructions are also include in your set. ****Outer box colors may vary.