Linear Guide Rail Set, SBR20 1500mm, 2 PCS 59 in/1500 mm SBR20 Guide Rails and 4 PCS SBR20UU Slide Blocks, Linear Rails and Bearings Kit for Automated Machines DIY Project CNC Router MachinesLinear Guide Rail Set, SBR20 1500mm, 2 PCS 59 in 1500 mm SBR20 Guide Rails and 4 PCS SBR20UU Slide Blocks, Linear Rails and Bearings Kit for Automated Machines DIY Project CNC Router Machines Product Features SBR Linear Guide Rail Set SBR20 1500 mm Linear motion guide rail includes 2 x 59 in 1500 mm length SBR20 guide rails and 4 x SBR20UU slide blocks. Dynamic Load Per Block: 882 N, Static Load Per Block: 1370 N. Durable & Long lasting The linear