Permanent neodymium magnet 1)composite:Nd2Fe14B 2)Grade:N,M,SH,UH,EH ... 4)Coating:Ni, Ni-Cu-Ni, Zn, etc Permanent neodymium magnet Specifications:1.ISO9001:2008 and SGS,ROHS certificates system, 2 ... Zn, Tin, Epoxy, Ni-Ag, Ni-Au, etc.Grade Available:N35-N52 working temperature: 80°C30M-45M, 50M working temperature: 100 ... high working temperature compared to the normal grades. Permanent neodymium magnet