688 full ceramic bearing 1.material : Si3N4,ZrO2 2.6801,6802,6803,6805,6805,6806 6901,6902,6903,6904,6905,6906 Type : ceramic ball bearing / full ceramic bearing/hybrid ceramic bearing/high tempreture bearing Bearing No.InnerOuterWidthdDWOpenShieldedSealedmmmmmm 683ZZ2RS372684ZZ2RS492.5685ZZ2RS5113686ZZ2RS6133.5687ZZ2RS7143.5688ZZ2RS8164689ZZ2RS91746800ZZ2RS101956801ZZ2RS122156802ZZ2RS152456803ZZ ...