Features: 100% brand new and high quality. China"s traditional hand sports equipment has a history of thousands of years.It"s a traditional folk fitness equipment,suitable for most people to play. In addition to relieving stress, Chinese Health Balls or Baoding Balls are known to improve joints, blood circulation, sleep patterns and memory. Keep your hands, fingers, wrist, and arm healthy. Recommended by hand therapists, using baoding balls can strengthen your hands and keep them flexible helping to manage hand conditions such as arthritis and nerve damage. Made of iron, durable and sturdy. Smooth surface is safe to use. The method of use is very simple: put 2 or more iron balls in your hand and let it spin.By running the ball with the fingers, the moving ball will stimulate the acupoints of the fingers and palms, which can play a role of exercise. Package Includes: 2 X Baoding ball 1 X Box(the color of box is random) Specifications: Color:as picture shown Material:Iron Size: One Size Length: 4.8cm( 1.89in) Width: 4.8cm( 1.89in) Height: 4.8cm( 1.89in) Quantity: 1 pair note: If you have big quantity (only need over 50 dollars), please feel free to contact me, I will give you SURPRISED PRICE(The more the quantity, the lower the price), thanks Size For Manual Measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you