Features: 1. This ball thrust bearing set features high precision, high speed, and wear small. 2. Small frictional resistance, low power consumption, high mechanical efficiency. 3. High grade steel ball, quiet and smooth rotation at a high speed. 4. Small internal clearance and high machining precision. 5. Suitable for machinery manufacturing, equipment installation and maintenance. Specification: Condition: 100% Brand New Item Type: Thrust Bearing Bearing Material: Bearing Steel Optional Models & Sizes: F5-10M, F5-11M, F5-12M F5-10M: Inner Wheel Inner Diameter : Approx. 5mm / 0.2in Inner Wheel Outer Diameter: Approx. 9.8mm / 0.4in Outer Wheel Outer Diameter: Approx. 10mm / 0.4in Outer Wheel Inner Diameter: Approx. 5.2mm / 0.2in F5-11M: Inner Wheel Inner Diameter: Approx. 5mm / 0.2in Inner Wheel Outer Diameter: Approx. 10.8mm / 0.4in Outer Wheel Outer Diameter: Approx. 11mm / 0.4in Outer Wheel Inner Diameter : Approx. 5.2mm / 0.2in F5-12M: Inner Wheel Inner Diameter : Approx. 5mm / 0.2in Inner Wheel Outer Diameter: Approx. 11.8mm / 0.5in Outer Wheel Outer Diameter: Approx. 12mm / 0.5in Outer Wheel Inner Diameter : Approx. 5.2mm / 0.2in Package List: 10 x Thrust 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.