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6921UU Sealed Ball Bearing 105x145x20mm Inner Diameter - 221mm 5206FF Bearing6921UU Sealed Ball Bearing 105mm x 145mm x 20mm 6921UU sealed Ball Bearing, Each bearing has 2 Sealed to protect the bearing from dust or any possible contamination, plus its pre lubricated with grease so its ready to roll right away. 6921UU Ball Bearing Deep Groove Ball Bearing Dynamic load rating Cr: 32,800 N Static load rating Cor: 31,600 N Limiting Speed: Grease Lubrication: 5,000 RPM Dimensions: 105mm x 145mm x 20mm Bearing Inner Diameter: 105mm