Chinese Fitness Balls, Panda Pattern Health Goods The pandas have color variations, with some being cream-colored. Made of metal Diameter: Approximately 4.5cm Weight: Approximately 160g These are health tools used by rolling the balls in the palm of your hand. A gentle sound (like a bell) is produced when rolling them. The case shows signs of aging. There are some stains and fraying. This is an old item, so please understand and accept this before purchasing.