Feature:1. Manufacturing Material: Made of high quality chrome steel material, long service life, slippy, no edges, and low noise during operation.2. Good Sealing: Both sides of the double row angular contact ball bearings are designed with seals to keep the lubricating oil in a sealed state.3. High Performance: Uniform hardness, wear resistance, high temperature resistance and double shielding to avoid contamination.4. Wide Application: Mainly used in textile machinery, printing machinery, automobile industry, household appliances, currency detector.5. Easy to Use: Easy to use and fine workmanship. Without any difficult requirements even though you use it for the first time.Specification:Item Type: Ball BearingWeight: Approx.223g / 7.9ozMaterial: Chrome SteelInner Diameter: Approx.20mm / 0.8inOuter Diameter: Approx.52mm / 2.0inThickness: Approx.22mm / 0.9in.Package List:1 x Bearing