alternator bearing 1.Material:chrome steel 2. Vibration:V4, V3, V2, V1 3.Models:Bxx-xxD, (W)6Series,949100 Series,others... alternator bearing:1.Material:chrome steel...2.Sizes:Various sizes available3. Vibration:V4, V3, V2, V14.Lubricant:High temperature grease5.Tolerance: ABEC-1, ABEC-3 6..Models:Bxx-xxD, (W)6Series,949100 Series,others... alternator bearing