... Neodymium magnet for Speakers The lagest size can be Dia 220mm, Typical Grade:N35,N40,N42,N45,N52,35H,38SH Speaker Neodymium ... 1500C (depending on grade and permeance coefficient magnet is operating at) The highest working ... rings, arc segments, etc.Grade Available:N35 to N53,N,M,H,SH,UH,EH, AH seriesSize ... 50mmx0.50mm for the block shape.Machine: Neodymium magnets should be machined by grinding using ...