... ,,NdFeB type rare earth magnet is much more prone to surface oxidation or rust,and elimination.Users should consider ... coating,plating or suitable surface treatment.5) Less prone to chipping during handling6) Lower temperature coefficient of magnetic properities ... ,N48,N50 and N529) High energy ranging from 8MGOe to 48MGOe with wondrerful coercive force.10) Less expensive,and mechanically stronger ...