... , Typical Grade:N35,N40,N42,N45,N52,35H,38SH Speaker Neodymium MagnetGrade Available:N35, N38, N40, N42, N45, N48, N50, N52 ... magnetizing field required: about 25KOeShape Available: blocks, bars, discs, rings, arc segments, etc.Grade Available:N35 to N53,N,M,H ... be 2.00mmx1.50mmx0.50mm for the block shape.Machine: Neodymium magnets should be machined by grinding using diamond wheels. However, of ...