HP N91999-001 SIM card tray is a replacement tray for the HP Fortis 11 G10 Chromebook, used to hold an optional SIM card in the computer’s SIM slot.
This part is the cosmic blue version. HP identifies N91999-001 as the cosmic blue tray; the separate flint gray option is N91998-001. The color distinction helps identify the matching spare part.
The guide shows the SIM card placed in the tray before the tray is inserted into the computer. The tray is intended for optional SIM card use in the HP Fortis 11 G10 Chromebook.