Features 1、WIDE APPLICATION: Suitable for your DIY router, milling machine and lathe. Widely used in automatic machinery, as well as automatic equipment and accuracy measuring equipment. 2、EXCELLENT PERFORMANCE: Strong tensile strength, hardness better than common materials on the market, anti corrosion, acid proof, rust proof. 3、HIGH CARBON STEEL MATERIAL: The linear guide rail is made of high carbon steel, and the linear bearing is made of steel, which is more durable and has low noise. Low friction coefficient and premium track accuracy. 4、PACKAGE INCLUDES: There are 2 shaft guide, 4 slide blocks, 4 shaft supports, 1 screw rod, 1 nut, 2 bearing pillows, and 2 elastic coupling in the package. 5、IDEAL REPLACEMENT: Wonderful replacement for the old or broken one, fine workmanship, attention to details, helps improve the performance of the machine. Specification Item Type: Linear Motion Rod Shaft Guide Material: High Carbon Steel, Aluminum Alloy, Brass Application: Applicable to industrial automation equipment and stepper motor guide rail; Such as 3D printer; Engraving machine; XYZ module; Slide block; Elevator. Package List 2 x Shaft Guide 4 x SC8UU Slide Block 4 x Shaft Support 1 x Screw Rod 1 x Nut 2 x KP08 Bearing Pillow 2 x Elastic Coupling