... , Typical Grade:N35,N40,N42,N45,N52,35H,38SH Speaker Neodymium MagnetGrade Available:N35, N38, N40, N42, N45, N48, ... weight.• Far better permanent magnetic performance compared with traditional magnets, but the price is relatively low. (by weight about 20times Ferrite ... be 2.00mmx1.50mmx0.50mm for the block shape.Machine: Neodymium magnets should be machined by grinding using diamond wheels. However, ...