[Bionic]

I have an unused black cartridge  (no 21) for an HP inkjet printer. Its quite old but if anyone still uses this type of cartridge and would like it I will put in the post for you.
It says on the box
HP Deskjet 3920, 3940, D1360, D2360, F380
HP Officejet 4315, 4355
HP Printer/Scanner/Copier 1402, 1410, 1415, 1417
 
I am assuming that means it fits any of the above.
Sally