... Color:white,Customized Specification:Diameter 1-25mm SGS, ISO certification Nano silver Antibacterial Ceramic Ball Description : One kind of environmental protection and ... industry, health care products etc. Specifications: 3~8mm Main Ingredients: Nano silver powder: 1%, Maifan Stone: 50~60% Zinc oxide: about ... water supply system and equipments, agriculture and industry, etc. Nano silver Ceramic Ball