Features 1、These bearings are made of high quality steel for low noise and long service life. 2、They are rubber sealed to avoid contaminants entering and save lubricant. 3、Bearings have a 10mm inner diameter, a 22mm outer diameter, and a 6mm thickness. 4、These are great for small hobby 10mm shaft/rod projects. 5、There comes total 10 pieces miniature bearings which you may use for many different projects. Specification Features: These bearings are made of high quality steel for low noise and long service life. They are rubber sealed to avoid contaminants entering and save lubricant. Bearings have a 10mm inner diameter, a 22mm outer diameter, and a 6mm thickness. These are great for small hobby 10mm shaft/rod projects. There comes total 10 pieces miniature bearings which you may use for many different projects. Specification: Model: 6900-2RS Material: Bearing steel Type: Deep-groove high-speed Rolling Element: Single row Inner Diameter: 10mm / 0.4in Outer Diameter: 22mm / 0.9in Thickness: 6mm / 0.2in Quantity: 10pcs Weight: 110g / 3.9oz(approx.) Package list: 10 * Bearings Package List