... :Abec-1, Abec-3, Abec-5, Abec-7 4.P Specifications1.high temperature ball bearings 2. Material : Si3N4 or ZrO2 3.Precisio:Abec-1, Abec-3, Abec-5, Abec ... ) Ceramic deep groove ball bearings, 2) Ceramic Angular contact ball bearings, 3) Ceramic Thrust ball bearings, 4) Ceramic Self-aligning ball bearings, 5) Ceramic insert bearings: UC201 - UC220 , 6) Hybrid ceramic bearings ...