free neodymium magnets n42 neodymium magnet n30 neodymium magnet n35 neodymium magnet n38 neodymium magnet Speaker Neodymium Magnet NdFeB magnet is mainly made of Neodymium, Iron and Boron, with excellent magnetic property, abundant raw material and reasonable prices, NdFeB Magnet can be used as an ideal magnet in mini-motor, Permanent magnetic resonance, sound device magnetic suspension system, ...