Medical ball: 1.can purify and active the water 2.can absorb the pollution of water 3.can be a medicine for health ... -40 eye, 40-80 mesh, 80 mesh. The ball has MaiFan quarry for 2-4-5mm 3mm, 8-9mm.Introduction and usage ... , manganese content is rich, it has obvious effect against failure, the three elements and magnesium, iron, copper, aluminum, iodine resistance cardiovascular ...