... grades:N35,N38,N40,N42,N45,N48,N50,N52 round magnet with custom hole guaranteed quality NiCuNi,Zn,Epoxy N35,N38,N40 ... force and high intrinsic coercive force.6, With precise tolerance.******************************************************************************************************************************Application for NdFeB magnet:Magnetic separator, Sensors, Wind generators,Vibration motors ...