... maximumworking temperature is usually 80ºC ,or 180ºC after special treatment. Disadvantage :NdFeB magnets are very easy to get rusted ... , they must be protected using special coating, such as Zn, Ni, Au, Epoxy.If you are ... to quote you prices:1.Magnet size and Dimension ,if special shape ,please offer 2.Magnets drawing.3.Magnetism grade 4.Coating ...