... temperature: 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 ... have been used universally in the world . It has super strong magnetic force and high intrinsic coercive force and after concocting ...