Full Ceramic I.D. 3mm-9mm Miniature Ball Bearings ZrO2 Zirconia White Premium
The ring and rolling body are made of oxide (ZrO2) ceramic material, and the cage is made of polytetrafluoroethylene (PTFE). Material：Zirconia Ceramics. Ceramic bearings are corrosion resistant, high temperature resistant, wear resistant self-lubricating, non-toxic, non-magnetic insulating, smooth, etc.