Item Type: SCS25UU Linear Bearing Material: Aluminum Alloy Inner Diameter: Approx. 25mm / 1in Length:Approx. 67mm / 2.6in Width: Approx. 76mm / 3in Height: Approx. 50mm / 2in Package List 1 x Bearing 1Surface oxidation treatment, beautiful and corrosion resistant, prevent dust from entering and prolong service life. 2Aluminum alloy material, strong bearing capacity, smoother moving, low friction, high rigidity and long life. 3Linear bearing is widely applied to electronic equipment, packaging machinery, equipment, robots, tools, machinery, machine tools etc. 4High quality bearings, exquisite workmanship, high accuracy, economical, easy to maintain replace. 5The universal ball bearings is great for you to replace the damaged ball bearings in your devices to improve them efficiency and save energy.