Hi there, thanks for getting in touch. The printer number 2600 is the series number so your printer will have a different model number possibly something like HP Deskjet 2630 or 2632 etc...
I think your printer might need the HP 304 inks but the best thing to do is if you have a quick look inside the printer at which cartridge is currently installed so that I don't suggest the wrong ones for you.
If it is the HP 304 range, you can find them here:
https://www.cartridgemonkey.com/model/HP-Deskjet-2630-ink-cartridges/.
