Need smooth, precise linear motion for your DIY project? This MGN12H set includes two 400mm rails and two matching blocks (MGN12C type). The rail is 12mm wide and 8mm tall, with a total height of 13mm when mounted. It's made from polished bearing steel for low friction and quiet operation. The block has 48 beads for high load capacity and can handle slight mounting surface imperfections. Pre-drilled with 14 holes for easy mounting (suggest using M3 T-nuts with 20-series aluminum extrusion). Ideal for 3D printers (like Kossel or CoreXY), CNC machines, robotics, or any small precision equipment. Comes oiled and ready to use, with a 1-year warranty for peace of mind.
