1.material:neodymium-iron-boron 2.neodymium ring magnet 3..Industrial application 4.coating:Zn.Ni-Cu-Ni,Ni,Gold,etc Super Ring Magnets,Large Ring Magnets,Neodymium Magnetsâ„ Specifications NdFeB magnet is with the strongest magnetism,good coercive force.1) Material: Sintered Neodymium-Iron-Boron;2) Temperature: Application of new sintered NdFeB magnet techniques and equipment like casting, HDDR ...