... ion, Far infrared, tourmaline, maifan. energy ceramic balls ORP Negative Potential Ceramic Ball Detail:Application:Used for drinking waterSpecifications ... and high temperature sinter, mainly used for reducing ORP of water and making it to negative value and ... Clay ball, Magnesium ceramic ball. Water Purifier Chemical:ORP Negative Potential,Far Infrared,Mineral,Maifan Stone,Silver ion antibacterial ...