... quality Neodymium rare earth magnet, Long block magnets with custom design Product specifications:1. Block magnet has grades of N35,N38, ... etc.2. Working temperature for NdFeB block magnets:from 80 centigrades to 200 centigrades.3. block magnets are thenecessary parts for motors ... of NdFeB magnet :Neodymium magnets are mainly made from neodymium ,iron, and boron. It is the ideal magnetic material in the ...