... ,Gold,silver, Application:medicine,machines. N35 sintered rare earth block NdFeb magnets in machines1. chemical composition of Nd2Fe14B2. grade: N30,N33,N35,N38 ... kinds of magnets.4. very high coercive force, IHC: 11KOe to 30KOe. 5. very brittle and hard, but lighter than other rare earth ... , speakers and magnetic holding and seperation systems etc. Strong sintered rare earth NdFeb magnets(block)