Days after buying these cartridges, which were delivered the day after the order, the printer they were bought for died. I emailed the supplier "Perfect Print" and explained I'd not used any of the cartridges or even opened the package, but that they were now no use to me. Although they clearly had no obligation to me they immediately agreed to take them back and issue a refund. I have since ordered more from them to suit my new printer. These were similarly instantly despatched and work well.
Perfect Print is an excellent on-line supplier. Thank you.