Ceramic bearings provide by SunYoung Industry have the advantages of high intensity, abrasion-resistance, heat-resistance, insulation, low weight, magnetism-resistance, and corrosion-resistance, which the metal materials don't own. 1) Specifications: ball bearings 2) Bearing rings: zirconia or silicon nitride 3) Balls: silicon nitride, zirconia, or alumina 4) Cage: PTFE, PA, PEEK or stainless steel, etc.