Item: 628RSStructure: Deep GrooveMaterial: Bearing SteelBore Dia (d): 8 mmOuter Dia (D): 24 mmWidth (B): eight mmClosures: Rubber SealLubrication: GreaseMagnetic: littleHardness: 58HRCCorrosion Resistance: GeneralClearance: C0Grades: ABEC-7