SHIELD: SCRS = S Chanel Rubber Shield to avoid contaminationCAGE: Nylon retainer with self lubricant materialBALLS: 6 balls; chrome steelRACEWAYS: 608 standard; stainless steelLUBRICANT: TK-gel made in USWEIGHT: 11g RadialTolerance: C3SPECIALS: Alubox incl. spacer & oilEngineered by Twincam