Features: This meditation ball set, also known as Baoding balls, relaxation balls, or Zen meditation balls, consists of two small balls designed to be held and rolled in one hand. Rolling the balls in your hand may help relieve stiffness and promote relaxation, similar to finger therapy. Repeated use may help support muscle and joint comfort, improve manual dexterity, and enhance hand strength. These balls are commonly used for stress reduction, relaxation, and hand exercise. Additionally, they may support joint health, blood circulation, sleep quality, and mental focus. Specifications: Item type: Exercise ball Material: Enamel-coated metal Types: A, B, C, D, E Diameter: Approximately 4.45 cm How to use: Place both balls in one hand and use the coordinated movement of your fingers—flexion and extension—to rotate the balls in a circular motion around each other. Package includes: 2 x Baoding balls 1 x Storage box Notes: Conversion: 1 cm = 10 mm = 0.39 inch 1. Due to differences in monitor displays and lighting conditions, the actual color of the item may vary slightly from the images shown. 2. Please allow 1–3 cm variation in measurements due to manual measurement methods.