Features High Quality Steel -- Made of high quality steel, these bearings offer low noise and long service life, ensuring reliable performance for your projects. Rubber Sealed Design -- The rubber sealed design prevents contaminants from entering the bearings, providing added protection and helping to save lubricant for extended use. Precise Dimensions -- With a 5mm inner diameter, 16mm outer diameter, and 5mm thickness, these bearings are perfect for small hobby 5mm shaft/rod projects, offering a precise fit. Versatile Usage -- This set includes a total of 20 miniature bearings, allowing you to use them for various projects and applications. Durable Construction -- Crafted from high-quality materials, these bearings are built to withstand heavy use and provide consistent performance over time. 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 5mm inner diameter, a 16mm outer diameter, and a 5mm thickness.These are great for small hobby 5mm shaft/rod projects. There comes total 20 pieces miniature bearings which you may use for many different projects. Specification:Model: 625RSMaterial: Bearing steelType: Deep-groove high-speedRolling Element: Single rowInner Diameter: 5mm / 0.2inOuter Diameter: 16mm / 0.6inThickness: 5mm / 0.2inQuantity: 20pcsWeight: 105g / 3.7oz(approx.) Package list:20 * Bearings Package List