block magnets: N35-N42-N52,N50M,N48H,N45SH,N40UH,N38EH ... 'C Custom-made dimension Precise tolerance Neodymium Rare Earth Block Magnets with holes, 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 ... SH,UH,EH) etc.2. Working temperature for Neodymium block magnets:from 80 centigrades to 200 centigrades.3. Can ...