... : ISO9001:ROHS 2.Coating: Nickel,Znic,Expoy,etc Free sample Permanent magnet disc 1. Materials: Neodymium-Iron-Boron;2. Technology: ... and equipment such as strip casting, HDDR technology; 3. Magnetic properties: High coercive force, the max operation temp is up ... as sensors, motors, rotors, wind turbines/wind generators, loudspeakers, magnetic hooks, magnetic holder, filters automobiles and so on.