... Neodymium magnet for Speakers The lagest size can be Dia 220mm, Typical Grade:N35,N40,N42,N45,N52,35H,38SH Speaker Neodymium ... , etc. Applications: Wind Power Generators, Motor Parts, MRI/Nuclear Magnetic Resonance (NMR), ... powder metallurgical processes. The magnetic performance of all grades is optimized ... magnets have 4 distinct characteristics: High corrosion resistance and Low temperature coefficient ...