Features: 1. This track roller bearing is mostly used in industrial automation equipment and photographic equipment tracks. 2. The bearing is stable, low noise and long service life. 3. Suitable for motors, toys, models, instrumentation, power tools, communication equipment, fitness equipment and other fields. 4. Product hardness, high precision, can withstand high speed, high load. 5. Made of high quality Stainless Bearing Steel material, rust and corrosion resistant. Specification: Condition: 100% Brand New Item Type: Bearings Model: U22 Diameter: Approx. 22.5mm / 0.9in Hole Inner Diameter: Approx. 8mm / 0.3in Width: Approx. 14.5mm / 0.6in Material: Stainless Bearing Steel AISI440 (9Cr18) Package List: 1 * Bearing Note: 1. Please allow slight error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. 1This track roller bearing is mostly used in industrial automation equipment and photographic equipment tracks. 2The bearing is stable, low noise and long service life. 3Suitable for motors, toys, models, instrumentation, power tools, communication equipment, fitness equipment and other fields. 4Product hardness, high precision, can withstand high speed, high load. 5Made of high quality Stainless Bearing Steel material, rust and corrosion resistant.