Specifications: Size: 10.5cm (diameter) Materials: TPR for plastic, ceramic balls and magnets Weight: 250g Main ingredients: 4 kinds of ceramic balls: Antibacterial ceramic ball 30G Far infrared and negative ions ball 30G Alkaline ceramic ball 30G Chlorine exclusion ball 30G Features: No hazardous substance remains after washing No electrostatic phenomenon Saves the consumption of water and electricity