... ,N40,N42,N45,N48,N50,N52 round magnets with holes, Any size Product specifications:1. neodymium rare earth round magnets with holes ... . Coatings: Ni, Zn, epoxy, gold,silver, Cu and so on (as per the requirements).5. NdFeB cylinder magnet has super strong ... after concocting , it can stand very high working temperature, as high as 200 centigrade.All These special features of NdFeN material make ...