VEVOR - Linear Rail Kit, SBR20, 2Pcs 2000 mm (78.74 inch) Linear Motion Guide Rails and 4Pcs Bearing Slide Blocks - Silver

Includes two linear rails and four slide blocks, designed for smooth and quiet linear motion. With a carbon steel shaft, precise mounting holes, and hole spacing, our aluminum rails ensure easy alignment and reduced vibration. Every slide block features ball bearings for jam-free travel.