The precise micro ball, with the diameter 0.8mm to 5.0mm, which is produced with super-hard material, can meet the demands of some special industries, with the limits of deviation in size reaching + 0.001and surface roughness 13.

Different kinds of magnetic materials can be selected, such as SmCo, NeFeB, Ferrite and various kinds of super-hard materials such as gemstones, crystals, ceramics, etc.