the aftermarket (black and color combo package) cartridges were the right cartridges, size's and fit... got about 10 printing's out of the new aftermarket cartridges and then quit working, causing error on my HP printer... after many different attempts to troubleshoot, I finally replaced them with my nearly empty old ones and error went away, and the old ones did print without any error... I then put the aftermarket brand back into printer and error returned, wouldn't print... Disappointing/frustrating!!!