... quality NiCuNi,Zn,Epoxy N35,N38,N40,N42,N45,N48,N50,N52 round magnets with holes, Any size Product specifications:1. neodymium ... ,N40,N42,N45,N48,N50,N52(M,H,SH,UH,EH) etc.2. Working temperature for neodymium round magnets with holes:from ... ,silver, Cu and so on (as per the requirements).5. NdFeB cylinder magnet has super strong magnetic force and high intrinsic coercive ...