Item Type: Linear Motion Ball Bearing Slide Block Model: SC30UU Material: Aluminum Alloy Length: 77mm or 3.03in Width: 70mm or 2.76in Height: 58mm or 2.28in Inner Diameter: 30mm or 1.18in Lubricant: Oil Lubrication Lubrication Method: Drip Lubrication 1Surface oxidation treatment, beautiful and corrosion resistance. 2High density aluminum alloy structure makes the slide block strong load bearing. 3Low friction and smooth movement makes it save energy. 4Easy to install, high precision, fast speed. 5Suitable for high speed mute high precision equipment, construction machinery, transmission device.1 x Linear Motion Ball Bearing Slide Block Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.