... 1.Material: Gcr15/ AISI 52100 / 100Cr6 2.Precision Grade: G10 3.Diameter: 2.0mm-6.35mm 4.HRC: 62-66 Our ... you need further assistance.Hubert huDiameter:2.0mm,2.381mm,3.175mm,3.969mm,4.763mm,5.953mm,6.35mmGrade: G10 G5Material ... ,6003ZZ,6004ZZ and etc.Material: Gcr15 / AISI 52100/ DIN100Cr6/EN31Metallurgical Structure: grade 3Sph: 0.11umVdwl: 0.13umAverage dB: 27dBRa:0.009umwidely ...