Features: Made of high quality ceramic ZrO2, high temperature resistance, high speed and wear small. Small frictional resistance, low power consumption, high mechanical efficiency. Resistant to corrosion and able to operate in harsh conditions. With the characteristic of high stability, high reliability, not easy to deform. Standardization size, used for machinery manufacturing, equipment installation and maintenance. Specification: Material: Ceramic Model: 626 Weight: Approx. 9g/0.3oz Color: White Retainer and its material :TN engineering plastics Number of scroll columns: single column Raceway type: deep groove raceway Inner diameter: 0.6cm/0.2inch Outside diameter: 1.9cm/0.7inch Thickness: 0.6m/0.2in Package List: 1 * ZrO2 Ball 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. Package List 1Made of high quality ceramic ZrO2, high temperature resistance, high speed and wear small. 2Small frictional resistance, low power consumption, high mechanical efficiency. 3Resistant to corrosion and able to operate in harsh conditions. 4With the characteristic of high stability, high reliability, not easy to deform. 5Standardization size, used for machinery manufacturing, equipment installation and maintenance.