... ,N50,N52 round magnets with holes, Any size Product specifications:1. neodymium rare earth round magnets with holes are with material grades of N35 ... ,N52(M,H,SH,UH,EH) etc.2. Working temperature for neodymium round magnets with holes:from 80 centigrades to 230 centigrades ... can produce magnets acccording to your own specifications or designs.2, We deliver goods in time and have excellent after-sale ...