... 230'C Custom dimension Disc,cylinder,block,tile.. strong N38,N40,N42..rare earth block magnets,Custom ... dimension Product specifications:1. Rare earth Strong block Magnets have grades of N35,N38,N40 ... ,UH,EH,AH) etc.2. Working temperature for Strong rare earth block Magnets: from 80 centigrades to ... universally in the world . It has super strong magnetic force and high intrinsic coercive force and ...