... , boron and other trace metals made alloy magnet, is the strongest magnetic rare earth permanent magnet, It is a high energy product (8MGOe ... used in motors, chucks, magentic lifter, sensors, computers, mobile phones, wind generator, etc. Grade: N35-N52,N33M-N50M,N30H-N48H,N30SH-N45SH ... Properties Test, Oxygen Test, etc.Magnetic Properties of NdFeb Magnets Permanent Magnet NdFeB