1.Neodymium magnet is one kind of the permanent magnets. 2.We are original manufacturer of magnet. 3. DC motor magnet ... easy to get rusted , they must be protected using special coating, such as Zn, Ni, Au, Epoxy.If you are interested ... and Dimension ,if special shape ,please offer 2.Magnets drawing.3.Magnetism grade 4.Coating or plating5.Order Quantities6.Delivery methodBy sea ...