The "HGH20CA bearing block" is a component that slides along an "HGR20 linear rail."
It is a square-type bearing block designed to carry heavy loads with smooth linear motion, commonly used in CNC machines, 3D printers, and automation systems.
The "HGH" refers to the block shape, "20" is the rail width in millimeters, and "CA" signifies the heavy-duty configuration.