A "Linear Rail, HGR15 x 400mm with HGH15CA Block" is a precision guide rail system commonly used in CNC machines, 3D printers, and automation equipment to provide smooth, precise linear motion.
The "HGR15" refers to the 15mm rail width, while the "400mm" is the length of the rail.
The HGH15CA block is a sliding carriage that moves along the rail, supporting heavy loads and maintaining stability.