Item: S684 RS CBStructure: Deep GrooveMaterial: Stainless Steel Hybrid CeramicBore Dia (d): 4 mmOuter Dia (D): 9 mmWidth (B): 4 mmClosures: Rubber SealLubrication: GreaseMagnetic: littleHardness: 58HRCCorrosion Resistance: GeneralClearance: C0Grades: ABEC-7