Feature: 1. [6 Piece Set] This linear rail slider set includes 2 linear guide rails with shaft length of 800mm (31.5in) and diameter of 12mm (0.5in), along with 4 SBR12UU sliders. 2. [High Precise] Equipped with high precise linear bearings, ensuring smoother sliding, low friction, and quiet operation. 3. [Perfect Linear System] The perfect combination of the main shaft rail and the aluminum alloy bracket provides a high performance linear guide system. 4. [Easy Installation] Align the linear slide rail with the slider opening, push the slider until it falls completely, the installation is easy and convenient. 5. [Wide Application] The linear rail set is widely used in DIY CNC milling machines, lathes, machine tools, bending machines, welding machines, and other automated machinery. Specification: Item Type: Linear Rail Slider Set Material: Steel Shaft, Aluminum Alloy Base Specification: SBR12-800 Use: Guide Rail Slider Rail Length: Approx. 800mm/31.5in Shaft Diameter: Approx. 12mm/0.5in Maximum Load Bearing Capacity: 100KG Slider Fixing Method: Lock Type. Package List: 2 x Linear Rail4 x Slider