... Various shape 3.Stable performance 4.Good corrosion resistance Ring magnets for speaker material: sintered NdFeB magnet;rare earth ... Milling-Pressing-Vacuum sintering-Maching-Plating -Inspection-PackingApplication:NdFeB magnets are widely used in communication, electronics, household appliances, ... Neodymium magnet), and Y25, Y30, Y30BH, and Y35 for Ferrite magnet is good.4) CoatingCoating of Zn, Ni, Ni ...