Features: This miniature bearing is made of high quality zirconium dioxide ceramic for low noise and long service life. Ceramic bearing is impervious to corrosion and rarely require lubrication. Bearing has a 25mm inner diameter, a 37mm outer diameter and a 7mm thickness. It is great for 25mm shaft/rod projects such as mechanical equipment,electrical instrument, toy, door and window. The bearing is used in a wide variety of applications including, electric motors, home appliances, toys and much more. Specification: Material: Zirconium dioxide ceramic Model: 6805 Inner Diameter: 25mm / 1in Outer Diameter: 37mm / 1.5in Thickness: 7mm / 0.3in Quantity: 1pc Weight: 22g / 0.8oz (approx.) Package list: 1 * Bearing Package List 1This miniature bearing is made of high quality zirconium dioxide ceramic for low noise and long service life. 2Ceramic bearing is impervious to corrosion and rarely require lubrication. 3Bearing has a 25mm inner diameter, a 37mm outer diameter and a 7mm thickness. 4It is great for 25mm shaft/rod projects such as mechanical equipment,electrical instrument, toy, door and window. 5The bearing is used in a wide variety of applications including, electric motors, home appliances, toys and much more.