Features: _x000D_ 1. This ball thrust bearing set features high precision, high speed, and wear small. _x000D_ 2. Small frictional resistance, low power consumption, high mechanical efficiency. _x000D_ 3. High grade steel ball, quiet and smooth rotation at a high speed. _x000D_ 4. Small internal clearance and high machining precision. _x000D_ 5. Suitable for machinery manufacturing, equipment installation and maintenance. _x000D_ _x000D_ Specification: _x000D_ Condition: 100% Brand New _x000D_ Item Type: Thrust Bearing _x000D_ Bearing Material: Bearing Steel _x000D_ Optional Models & Sizes: F9-20M, F10-18M, F12-21M _x000D_ F9-20M: _x000D_ Inner Wheel Inner Diameter: Approx. Approx. 9mm / 0.4in _x000D_ Inner Wheel Outer Diameter: Approx. 19.8mm / 0.78in _x000D_ Outer Wheel Outer Diameter: Approx. 20mm / 0.8in _x000D_ Outer Wheel Inner Diameter: Approx. 9.2mm / 0.36in _x000D_ F10-18M : _x000D_ Inner Wheel Inner Diameter: Approx. 10mm / 0.4in _x000D_ Inner Wheel Outer Diameter: Approx. 17.8mm / 0.7in _x000D_ Outer Wheel Outer Diameter: Approx. 18mm / 0.7in _x000D_ Outer Wheel Inner Diameter: Approx. 10.2mm / 0.4in _x000D_ F12-21M: _x000D_ Inner Wheel Inner Diameter: Approx. 12mm / 0.5in _x000D_ Inner Wheel Outer Diameter: Approx. 21mm / 0.8in _x000D_ Outer Wheel Outer Diameter: Approx. 21mm / 0.8in _x000D_ Outer Wheel Inner Diameter: Approx. 12.2mm / 0.5in _x000D_ _x000D_ Package List: _x000D_ 10 x Thrust Bearing _x000D_ _x000D_ Note: _x000D_ 1. Please allow slight error due to manual measurement. Thanks for your understanding. _x000D_ 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 ball thrust bearing set features high precision, high speed, and wear small. 2Small frictional resistance, low power consumption, high mechanical efficiency. 3High grade steel ball, quiet and smooth rotation at a high speed. 4Small internal clearance and high machining precision. 5Suitable for machinery manufacturing, equipment installation and maintenance.