we are one of the leading exporter of the bearing seamless steel tube,and the information are as follows:
1.coldrawn seamless steel sherodis annealed tube
2.concentricity: 0.2mm
3.surface defect:there will not any kind of crack on OD or ID(crack free material)
4.straightness:1mm/1000mm
5.tolarance:OD +/-0.1MM WT +/-0.15MM