Item: 6001 RSStructure: Deep GrooveMaterial: Bearing SteelBore Dia (d): 12 mmOuter Dia (D): 28 mmWidth (B): nine mmClosures: Rubber SealLubrication: GreaseMagnetic: littleHardness: 58HRCCorrosion Resistance: GeneralClearance: C0Grades: ABEC-7