... much higher than 1.67 the consisitency of surface magnetic field and magnetic flux can be controlled with +/-1%4)High Anti ... ,average low weight loss less than 2 mg/cm2 NdFeB magnetic applications:loudspeakers,motor assemblies,windmill,Home appliance,acousics,communication equipment ... ,step motor,DC motor and linear motor,mircrophones On a magnetic plate, it can hold approx. 10-12 pieces of A4 paper ...