Item Type: Linear-Motion Bearing Material: Bearing steel Optional Style: LM25LUU, LM20LUU, LM16LUU LM25LUU: Inner Diameter: Approx. 25mm / 1in Diameter: Approx. 40mm / 1.6in Height: Approx. 111mm / 4.4in LM20LUU: Inner Diameter: Approx. 20mm / 0.8in Diameter: Approx. 32mm / 1.3in Height: Approx. 80mm / 3.1in LM16LUU: Inner Diameter: Approx. 16mm / 0.6in Diameter: Approx. 28mm / 1.1in Height: Approx. 70mm / 2.8in Double-sided rubber seals help prevent contamination and extend service life Nylon retainer provides low motion inertia, low starting torque, reduced noise, and smooth operation Precision polished surface for high smoothness and brightness Suitable for industrial automation, aerospace, machine tools, engraving machines, robots, and automotive applications Provides stable friction performance, enabling smooth linear motion with high sensitivity and accuracy Constructed with bearing steel for durability Outer ring and steel balls made of bearing steel, heat-treated to enhance lifespan and load capacity Compact design allows for easy installation; can be mounted in any direction using the shaft as a support for precise operation; mounting surface is easy to machine 1 x Linear-Motion Bearing