689-2RS Sealed Ball Bearing9mm x 17mm x 5mm 689-2RS Sealed Ball Bearing, 689-2RS is made of Chrome Steel, this bearing is sealed with rubber seals to protect the bearing from dust or any possible contamination, this is self lubricated bearing (Bearing is already greased). Item: 689-2RS Ball Bearingtype: Deep Groove Ball BearingMaterial: Chrome Steel Closures: 2 Rubber SealsQuality: Electric Motor Quality Dimensions: 9mm x 17mm x 5mm/MetricID (inner diameter)/Bore: 9mmOD (outer diameter): 17mmWidth/Height/thickness: 5mmQuantity: One BearingDynamic load rating Cr: NStatic load rating Cor: NLimiting Speed: Grease Lubrication: RPM