FeaturesBalls: 7 lightweight ceramicShield: Z (open on one side)Cage: Thermoplastic materialRaceways: Steel material (rain coated)Lubricant: Super light low friction oil
FeaturesBalls: 7 chrome-steelShield: Z (open on one side)Cage: Nylon Raceways: Steel materialLubricant: Fluid oil Rating: ABEC9
FeaturesBalls: 7 chrome-steelShield: Z (open on one side)Cage: Nylon Raceways: Steel materialLubricant: oil Rating: ABEC3