Supply B series automotive alternator bearings as ODM and OEM. We ... serial products in British measurement system .Features:1) Bearing type: B series, 949100 series2) Bore diameter range: 10mm to 60mm ... ) Tolerance codes: ABEC-1, ABEC-3 6) Vibration level codes: V4, V3, V2, V1 7) Internal clearance codes: C0, C2, C3, ... B17-107D, B17-126D, B17-126D. Automotive Alternator Bearing (B series,949100 series)