... . size: D16*2*4mm; 4. coating:Ni; 5.magnetization: axial ring magnet, rare earth, neodymium magnet, magnetic material, Neodymium magnet, NeFeB ... and shape customs General informatin of ndfeb magnet:1.Shape:ring, cylinder, block, arc, ladder and any typ with hole.2 ... 1/32" minimum on thickness 1/16" minimum diameter on outer diameter3.Various coatings: Ni, Zn, Ag, Plastic, Phosphor, Epoxy, Au ...