【High Quality】: These LM8LUU Linear Ball Bearings are made of high quality bearing steel for low noise and long service life
【Improve Efficiency】: 3D Printer CNC Parts Linear Bearings Set are double sealed to avoid contaminants entering and save lubricant, replace the damaged ball bearings in your devices to improve efficiency and save energy
【Low Noise】: Linear Motion Bearing provides safe and reliable for the bearing sleeve and the bearing house assembly, much smoother and quieter than plastic bushings, ball in the cage loop to run a smooth ball guide surface even if in high-speed operation, low noise
【Size】: Bearings have a 8mm inner diameter, a 15mm outer diameter, and a 45mm length
【Application】: These are great for small hobby 8mm shaft/rod projects such as 3D printer, engraving machine