Features High-Quality Zirconia Ceramic: This miniature bearing is made of high-quality zirconia ceramic, ensuring low noise and long service life, providing durable and reliable performance for various applications Corrosion-Resistant and Low Maintenance: Ceramic material is impervious to corrosion, reducing the need for frequent lubrication, saving time and maintenance costs for long-term use Precise Dimension: With an 8mm inner diameter, 22mm outer diameter, and 7mm thickness, this bearing is specifically designed for 8mm shaft/rod projects, offering a perfect fit and smoth operation in various mechanical equipment, electrical instruments, toys, doors, and window Versatile Application: Suitable for use in electric motors, home appliances, toys, and more, this bearing offers reliable performance across a wide range of applications, ensuring flexibility and adaptability for different uses Enhanced Performance: This bearing provides smooth and efficient operation, making it an ideal choice for demanding applications where precision and reliability are essential Specification:Material: Zirconia ceramicModel: 608Inner Diameter: 8mm / 0.31in Outer Diameter: 22mm / 0.87inThickness: 7mm / 0.28inQuantity: 8pcsWeight: 96g / 3.4oz (approx.) Package list:8 * Bearings Package List