... than 1.67 the consisitency of surface magnetic field and magnetic flux can be controlled with +/-1% ... loss less than 2 mg/cm2 Neodymium Magnetic applications:loudspeakers,motor assemblies,windmill,Home appliance, ... and linear motor,mircrophones Pros: Very strong hold when contacting another magnet or plain iron, ... away (easy to slide however). Pretty strong hold between two of these even with a couple ...