The grade of the NdFeB magnet can be ranged N35-N52, N30M-N50M, N30H-N48H, N30SH-N45SH,
28UH-40UH, 28EH-38EH.the coating cover Ni, Zn, Cr, Sn, Epoxy etc, for the magnetized direction including Axial, diametral, radial etc