Detailed Product Description Mineral Ceramic Balls Technical SpecificationSize: ranule Sizes: 4- 5mm, 6-8mm ... of soaking water solution: 6.58.5 Insoluble, gradually releasing mineral substance Packing, Storage and Transportation:Plastic bag, 25kg/bag,or ... care ball that is mainly made of the natural nonmetal mineral tourmaline, Maifan Stone, porcelain clay and calcium carbonate by nanometer ...