Material:Neodymium-Iron-Boron Coating:Ni-Cu-Ni ,Nickel ,Zn ,Gold ,Cr ,Silver ,Copper Black ,Epoxy ,Chemical ,PTFE Parylene Shapes:Disc, Cylinder, Block, Ring, Countersunk, Segment, Trapezoid, Irregular shapes and customized made. Applications:Used in many fields, such as motors, sensors, microphones, wind turbines, wind generators, VCMs in hard disk drives, printer, switchboard, loudspeakers, ...