The HP 40 ink cartridges are a set of four inkjet printer cartridges, which is used in large format and high volume Hewlett Packard printers. Using three coloured ink cartridges, with black, provides traditional four colour printing, which is fine for most business use, but is not as good as five or more colours when printing photographs with inkjet ink. As inks are used at different rates, having an individual ink cartridge for each colour is more economical than having combined ink cartridges.
We can supply HP original inkjet cartridges, for all four ink cartridges, or an InkTec ink refill kit for the black ink cartridge only. We do not supply compatible cartridges or remanufactured (recycled) ink cartridges for this set
If you are looking for cheap ink, we recommend that you look at the prices of the cost of refilling your own black ink cartridges.