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 15mm inner diameter, a 24mm outer diameter, and a 5mm thickness. These are great for small hobby 15mm shaft/rod projects. There comes total 10 pieces miniature bearings which you may use for many different projects. Specification: Model: 6802RS Material: Bearing steel Type: Deep-groove high-speed Rolling Element: Single row Inner Diameter: 15mm / 0.6in Outer Diameter: 24mm / 0.9in Thickness: 5mm / 0.2in Quantity: 10pcs Weight: 73g / 2.6oz(approx.) Package list: 10 * Bearings Package List 1These bearings are made of high quality steel for low noise and long service life. 2They are rubber sealed to avoid contaminants entering and save lubricant. 3Bearings have a 15mm inner diameter, a 24mm outer diameter, and a 5mm thickness. 4These are great for small hobby 15mm shaft/rod projects. 5There comes total 10 pieces miniature bearings which you may use for many different projects.