Radial Oriented ring sintered neodymium rare earth permanent N52 N35 magnets/china NdFeB Magnet Sintered NdFeB Magnets: The most powerful magnet in the world ! 1). Super strong magnetic force, 11700 - 14800 Gauss. 2). Hard, brittle and exellent resistance to corrosion with surface coating. 3). Moderate Temperature Stability, Max working Temp is 220 celcius. 4). Advanced Production Technology ( Strip casting, HDDR) 5). Extremely Resistance to demagnetization. Contact us if you need more details on Speaker Magnet Driver. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Speaker Transducer、Driver Unit. If these products fail to match your need, please contact us and we would like to provide relevant information.