Brand new and excessive qualityMaterial: Aluminum AlloyType: SCS6UU SCS8UU SCS10UU SCS12UU SCS16UU SCS20UUSize: as shownSuitable for CNC 3-d Printer Shafts Rod Parts Features:- Aluminium Alloy Linear Ball Bearing Slide Block Units- Light-weight housing and Chromium Steel bearing ball, good abrasion resistance, high precision and nice strength- Smooth moving, low friction, excessive stress and lengthy operating life- Suitalbe for kinds of digital equipment/guide bar, and pillarNotice:1. The real coloration of the item could also be slightly diversified from the pictures proven on the online page brought on by many points similar to brightness of your computer screen and lightweight brightness.2. Please allow slight handbook dimension deviation for the data. Thank to your understanding.3. 1cm=0.39''.Package Included: 1x Linear Ball Bearing