HP RC4-2448-000CN stepped upper cover is a plastic cover for the stapler/stacker unit assembly. It is identified as the upper stepped cover for this assembly, making the part’s position and intended use clear when sourcing a matching printer component.
The catalogue describes this item specifically as a plastic cover. It is a component for the stapler/stacker unit, rather than a complete assembly. Its stepped upper-cover designation distinguishes it from other covers used in the printer’s finishing equipment.