round magnets all grades:N35,N40,N42,N45N48N52,M,H,SH,UH,EH round magnet with custom hole guaranteed quality NiCuNi ... Zn,Epoxy neodymium rare earth round magnets with holes, all grade material available,Any size Product specifications:1. neodymium rare earth ... round magnets with holes are with material grades of N35 ...