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 NewItem Type: BearingsModel: T22Diameter: Approx. 22.5mm / 0.9inHole Inner Diameter: Approx. 8mm / 0.3inWidth: Approx. 14.5mm / 0.6inMaterial: Stainless Bearing Steel AISI440 (9Cr18)Package List:1 * BearingNote: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.