... Zn,etc. neodymium disc magnet Product Image Descriptionneodymium disc magnet1.Material:rare earth ,Neodymium -Iron-Boron2.Shape:Tile,Ring,Disc,Round,Block ... N45SH,etc.5.Coating :NiCuNi, Ni,Zn,Gold,Silver,Epoxy,chemical plating Ni,etc.6.Application: Sensors, Motors, Rotors ... Magnetic hooks & holder, Filters, Automobiles, Jewelry.Box,etc. Neodymium magnet advantages a) High energy b) Very high Hc and Hci ...