... Medical ball introduction: Red Medical ball series, the MaiFan quarry stone particles. Stone grain specification is 2mm 1-2-3-5mm 3mm 8mm ... eye, 40-80 mesh, 80 mesh. The ball has MaiFan quarry for 2-4-5mm 3mm, 8-9mm.Introduction and usage ... Japan, and widely applied to the "healthy healing stone" is. Stone mineral water contain potassium, sodium, calcium, magnesium, phosphorus, titanium, vanadium, ...