Feature:1. Adopt double-sided dust-proof rubber sealing to prevent foreign matter from entering and prolong service life2. Adopt nylon retainer, low motion inertia, low starting torsion, less noise and smoother operation3. High-tech polished surface with high smoothness and high brightness4. Suitable for industrial automation, aerospace, machine tools, engraving machines, robots and automobiles5. The linear bearings are frictional and relatively stable, do not change with the speed of the bearing, and can obtain smooth linear motion with high sensitivity and high accuracy.6. Adopt bearing steel material, durable to use.7. Outer ring and steel ball are made of bearing steel material, strengthened by heat treatment, increasing life and load8. Compact structure, easy to install, ordinary linear bearings can be installed in any direction, using the shaft as a support for precise work, and the mounting surface is easy to machineSpecification:Item Type: Linear-Motion BearingMaterial: Bearing steelOptional Style: LM25LUU, LM20LUU, LM16LUULM25LUU: Inner Diameter: Approx. 25mm or 1in Diameter: Approx. 40mm or 1.6in Height: Approx. 111mm or 4.4inLM20LUU: Inner Diameter: Approx. 20mm or 0.8inDiameter: Approx. 32mm or 1.3inHeight: Approx. 80mm or 3.1inLM16LUU: Inner Diameter: Approx. 16mm or 0.6inDiameter: Approx. 28mm or 1.1inHeight: Approx. 70mm or 2.8in.Package List:1 x Linear-Motion Bearing