... Treatment Nanxiang have many kinds of ceramic ball for your optional , and also can use mixed.Features: 1) Size: dia. 2 ... good heat-storing, high hardness and infrared, it is widelyused for human healthy, water treatment, spa and environmentally friendlyAdvantages: 1) ... and equipments, agriculture and industry, etc. Instruction For Use:Should wash with clean water for two times in the first, then can ...