HP 303 Ink Cartridges (BT48)

I bought the wrong ink cartridges for a HP printer.
I bought:
 - "HP 303 Ink XL Black"
 - "HP 303 Ink XL Tricolour"
Unfortunately while these looked like and seemed to fit in the printer
they were not the ones I needed. So they didn't work.
Because I had opened the packets the shop would not take them back!

They may have dried up. But worth a try.
If you have the right printer for these they might save you quite a bit.

The second picture lists the compatible printers.