VEVOR Linear Guide Rail Set, SBR20 2200mm, 2 PCS 86.6 in/2200 mm SBR20 Guide Rails and 4 PCS SBR20UU Slide Blocks, Linear Rails and Bearings Kit for Automated Machines DIY Project CNC Router MachinesProduct Features SBR Linear Guide Rail Set SBR20 2200 mm Linear motion guide rail includes 2 x 86. 6 in 2200 mm length SBR20 guide rails and 4 x SBR20UU slide blocks. Dynamic Load Per Block: 882 N, Static Load Per Block: 1370 N. Wide Application The SBR linear rail set is versatile and suitable for all kinds of high load automation equipment and DIY project, such as router mill lathe sleds, 3D printers, laser engravers, CNC machines, trainer rocker