Neodymium magnets is an alloy magnet made fromNd,Fe,B and other metal elements.It is with the strongest magnetism,good coercive 1.The property of magnetMaterial:NdFeB Rare earthGrade :35-N52, N33M-N50M, N30H-N48H, N30SH-N45SH, N28UH-N40UH, N30EH-N35EH, N30AH- N33AHBr:1080-1450GS. Hcb:10-13KGS Hcj:12-35Koe Max working Temp:80-240 DegreesSurface treatment: Ni, Ni + Cu + Ni, Zn, epoxy, gold, tin and ...