... , N35,N38,N40,N42,N45,N48,N50,N52.. Product specifications:1. Neodymium rare earth block magnets with different grades of: N35,N38,N40 ... ,N42,N45,N48,N50,N52(M,H,SH,UH,EH) etc.2. Working temperature for Neodymium block magnets:from 80 centigrades to ...