Permanent neodymium magnet 1)composite:Nd2Fe14B 2)Grade:N,M,SH, ... ,SGS,ROHS 4)Coating:Ni, Ni-Cu-Ni, Zn, etc Permanent neodymium magnet Specifications:1.ISO9001:2008 and SGS,ROHS certificates ... resistance and high working temperature compared to the normal grades. Permanent neodymium magnet