HP ink cartriges feed too much information to my Photosmart C7280- printer. My Cyan and Lt. Cyan were said by the printer to be out of ink. That rendered the printer unusable. I had been just using black only print selections while bypassing the "low ink" warnings. I have 2 large-supply black cartridges I wanted to use. I hesitated buying the colors I needed to get the printer running again since genuine inks are pretty expensive. I had never used refills before so I was leary about whether the printer could ignore info that might further disable the printer. No worries with these from Monoprice. They are working just like the genuine HP product. I ordered one each of all 5 colors and caught Monoprice's 20% off discount as well. I have never been dissatisfied with any of my orders from Monoprice..