Wheel BearingTECHNICAL SPECSModel: 6903 2RSStructure: Deep GrooveMaterial: Bearing SteelGrade: ABEC-7Bore Dia (d): 17mmOuter Dia (D): 30 mmWidth (B): 7 mmClosures: Sealed (2RS)Lubrication: GreaseClearance: C0