NdFeB Magnets: Grade:N35-N52,35M-50M,30H-48H,30SH-45SH,30UH-40UH and 28EH-38EH Certification:1.Environment system: ISO14001:20 NdFeB Magnets: Grade:N35-N52,35M-50M,30H-48H,30SH-45SH,30UH-40UH and 28EH-38EH Certification:1.Environment system: ISO14001:2004 2.Quality system: ISO9001:2008 3.Certificate: ISO/TS16949:2009 Certificates can be verified in our website. Coating:Ni,Zn,NiCuNi,Gold, or Epoxy ...