Function: 1 Surface oxidation treatment, beautiful and corrosion resistant. 2. Constructed of high density aluminum alloy, the sliding block has strong load-bearing capacity. 3 Less friction and movement to save energy. 4 Easy to install, fast and fast 5 Suitable for high speed mute high equipment, construction machinery, transmission equipment. Specifications: Item Type: Linear Motion Ball Bearing Slide Block Model: SC30UU Material: Aluminum Alloy Length: 77mm / 3.03in Width: 70mm / 2.76in Height: 58mm / 2.28in Inner Diameter: 30mm / 1.18in Lubricant: Oil Lubricating Method: Drip Lubricating .we-text table td, .we-text table th; we-text table, Package List: