Features WIDE APPLICATION: This linear motion set are widely used in fields requiring accuracy transmission control and positioning, including wind power generation, solar energy equipment, new energy equipment, high speed rail equipment, electronic equipment, CN SIMPLE REPLACEMENT: The linear guide rail is replaceable, and the slider block, guide rail, can be separately changed to re establish accurate guiding. STRONG BEARING CAPACITY: This linear guide rail and slide block combination is made of premium alloy steel and can support heavy loads. CENTERING CAPABILITY: This linear motion set can make μm level accurate placement thanks to its automatic centering mechanism. PACKAGE INCLUDE: There are 2 linear motion guide rails and 4 slider blocks in the package, ideal replacement for the old and damaged parts for better performance. Specification: Item Type: Guide Rail Slide Block Set Material: Alloy Steel, Aluminum Alloy Application: Widely used in various industrial fields such as machine tools, construction machinery, robots, speed reducers, steel, metallurgy, textiles, mining, printing, aerospace, and so on. Package List:2 x Guide Rail 4 x Slide Block  Package List 2 x Guide Rail 4 x Slide Block