Item: 6800 RS CB Structure: Deep Groove Material: Bearing Steel Ball Material: Ceramic Si3N4 Bore Dia (d): 10 mm Outer Dia (D): 19 mm Width (B): 5 mm Closures: Rubber Seal Lubrication: Grease Magnetic: little Hardness: 58HRC Corrosion Resistance: General Clearance: C0 Grades: ABEC-7