... : 80-230'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,N42,N45,N48, ... ,EH,AH) etc.2. Working temperature for Strong rare earth block Magnets: from 80 centigrades to 230 centigrades.3. Can be ...