Hi, I am selling a set of three genuine HP 935 XL colour ink cartridges, which are brand new and in their unopened original packaging.  The set includes all three colours required - Magenta, Cyan and Yellow - for colour printing.  I purchased them for my printer which unfortunately stopped working and these are now no longer needed.  

They are genuine HP cartridges and hence you can be assured they will work with these two printer models - HP OfficeJet Pro 6200 and 6800 series.  I don't know if they are compatible with other printers.

I also have a pair of black ink cartridges (934 XL) available in a separate listing if that is of interest as well.

Happy to answer any questions if I can, I will post through Evri (UK only).