Features 1、100% Brand new and high quality 2、These liner-motion bearings are made of high quality bearing steel for low noise and long service life 3、They are double sealed to avoid contaminants entering and save lubricant 4、Bearings have a 10mm inner diameter, a 19mm outer diameter, and a 29mm height 5、These are great for small hobby 10mm shaft/rod projects such as 3D printer, engraving machine Specification Features: 100% Brand new and high quality. These liner-motion bearings are made of high quality bearing steel for low noise and long service life. They are double sealed to avoid contaminants entering and save lubricant. Bearings have a 10mm inner diameter, a 19mm outer diameter, and a 29mm height. These are great for small hobby 10mm shaft/rod projects such as 3D printer, engraving machine. Specifications: Type: LM10UU Material: Bearing steel Inner Diameter: 10mm / 0.39 inch Outer Diameter: 19mm / 0.75 inch Height: 29mm / 1.14 inch Quantity: 8pcs Package Includes: 8 x Bearings Package List