... grades:N35,N38,N40,N42,N45,N48,N50,N52 round magnet with custom hole guaranteed quality NiCuNi,Zn,Epoxy N35, ... ,N42,N45,N48,N50,N52 round magnets with holes, Any size Product specifications:1. neodymium rare earth round magnets with holes are with ... ,H,SH,UH,EH) etc.2. Working temperature for neodymium round magnets with holes:from 80 centigrades to 230 centigrades.3 ...