The NdFeB permanent magnets are the most powerful permanent magnets with the high remanence , high coercive force , high BH product and high performance-price ratio. The rotor made by the NdFeB magnet are more stronger powerful , greater lift and more silent . Wildly used in the aviation , electronics ,electroacoustics, machinery,transportation, meters , medical field and aquarium. Aresell well in China , American , Europe and so on .