The HP RL2-0096-000CN Upper Cover Assembly is a replacement cover component for the printer’s upper section. It is identified for simplex models and is listed as the upper cover for the HP Color LaserJet M553n.
This part number distinguishes the simplex cover from the separate upper-cover assemblies listed for the M553x, M552dn and M553dn. Its purpose is straightforward: to replace the designated upper cover on a compatible printer. The listing confirms the assembly identity and model distinction; it does not specify dimensions or package contents.