Product name : Sensor magnetCustom Super Strong permanent 35M Neodymium Arc Magnets for PM motor 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 : N35M,N40M,N45M,N42H,N48H,N35SH,N40SH,N33UH,N33EH Tolerance in size : +/-0.1 mm