Features: brand new and high quality. Baoding balls:also known as meditation balls,are two little balls that can be held in one hand. China"s traditional hand sports equipment has a history of thousands of years. Best Gift:Packed in a nice gift box, these baoding balls with so many benefits mean great gift for parents, friends, lovers, and more to encourage them do hand exercise anywhere . Easy to use:When exercising, put two balls in your hand, relying on fingers flexion and extension, so that the two balls circled with each other. High-Quality Material:Electroplate metal balls, smooth surface and hardy structure for durable using. Multiple Benefits:Beneficial to the brain, relaxing brain while playing. Stimulate the circulation of blood and energy throughout the body.Keep your hands, fingers, wrist, and arm healthy. Package Includes: 2 x Baoding Balls 1x Box(The Color of the Box is Random) Specifications: Color:Silver Material: metal Size: Diameter: 3.3cm/ 1.3in(Type A) Diameter: 3.8cm/ 1.5in(Type B) 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 for 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