... ,DIN,AISIHardness: 60HRC-62HRCGrinding precision: 0.001mmEdm precision: 0.002mmSurface roughness: RA0.4Verticality: 0.002mm Packaging & DeliveryPackaging Detail:inner packing: packed ... size ,for example:M2.0,D 14*25.4,The surface coating type ,for example:Tin,Ticn5,It is the best ...