Item: MR115 RSStructure: Deep GrooveMaterial: Bearing SteelBore Dia (d): 5 mmOuter Dia (D): 11 mmWidth (B): four mmClosures: Rubber SealLubrication: GreaseMagnetic: littleHardness: 58HRCCorrosion Resistance: GeneralClearance: C0Grades: ABEC-7