Description: Replace the damaged ball bearings in your devices to improve efficiency and save energy. Smooth moving, low friction, high rigidity and long life. ST stands for light load, with one retainer inside. Wide applications, great for linear motion on 3D printer,CNC,and other applications. Specification: Size(Inner Diameter x Height): ST6: 12mm x 20mm Package Includes: 1 Piece Linear Motion Bearing
