The most strength magnet materials available nowadays. Because of their powerful and good demangetization resistance, smaller magents can be used to get the same energy, therefore it contributes to the development of many small and flat moters used in the high-tech industry. However, neodymium magnets have to be plated to against rusted and should not be used at extremely high temperature. The grade of such magnets can be Grade N, M , H, SH, UH,EH, AH.The details of each grade of the neodymium magnets please visit our website www.east-magnet.com. The coating of NdFeB magnets can be Zn, Ni, Ni-Cu-Ni, Epoxy, CR3+ZN, NI+AG, NI+AU and so on.