... series 1.High precision,best price 2.Material: AISI52100, AISI440C 3.Welcome OEM orders Thin section deep groove ball bearing 1) Bearing type: 6700,6800, 6900, R ... -1, ABEC-3, ABEC-5, ABEC-7 6) Vibration level codes: V4, V3, V2, V1 7) Internal clearance codes: C0, C2, C3 ...