China Rare Earth Magnet Limited manufactures strong neodymium permanent magnets http://www.permanentmagnet.com/. There are various grades, sizes and shapes. Commonly, it has disc, ring, rectangle, cylinder, arc shape and so on. And the usual coating of neodymium magnet is Ni-Cu-Ni, Zn or black epoxy. Besides, it is the strongest magnetic material in the world, which is called super magnet. Precisely with this characteristic, it is in rapid development and wild application nowadays.