... 220mm, Typical Grade:N35,N40,N42,N45,N52,35H,38SH Speaker Neodymium MagnetGrade Available:N35, N38, N40, N42, N45, N48 ... distinct characteristics: High corrosion resistance and Low temperature coefficient, Large dimensions or Small sizes. The newly developed L-T Sintered ... regularly being developed.• Available from very small sizes to large blocks.• Relatively easy to machine, compare to AlNiCo and ...