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