Permanent Magnets Material Grade of NdFeB magnet: Magnet N-( N35, N38, N40, ... , package, Printer, Switchboard, Phone, voice coil motors (VCM's) in hard disk drives, high performance motors, brushless DC motors, magnetic separation ... resonance imaging, sensors, loudspeakers etc.2) The coating of NdFeB magnets can be Zn, Ni, Ni-Cu-Ni, Epoxy, CR3+ZN ...