Product name : Disc magnet,Custom Super Strong permanent N42 Neodymium Magnets Shape:Segment, Disc, Cylinder/Rod, Ring, Countersunk, Segment, Trapezoid, Irregular shapes are available, Customized shapes for Sintered NdFeB Magnet are also available) Direction of magnetisation : Through the thickness or through the diameter Type of coating : Nickel, Ni-Cu-Ni, Zn, Gold, Silver, Copper, Epoxy, Chemical, PTFE, Parylene, Everlube, Passivation and so on. Grade : N35,N38,N42,N48,N52,N45M,N48M,N50M,N38H,N42H,N35SH,N42SH,N30UH Tolerance in size : +/-0.1 mm