These ink cartridges are just rebranded lexmark 16 (black) and 26 (color) cartridges. Why pay above full retail prices for a regular lexmark cartridge? Do what I did, take a hi-res photograph of the "color bar codes" on the "Primera" cartridges. Print them out on high quality paper at a high dpi and tape them to the underside of the printhead mechanism where the reader can find them. You'll never need to buy another rebranded cartridge again. I buy genuine, high yield Lexmark 26 color carts on average for $16 shipped. And I've gone through over 30,000 prints so far with my machine. That's easily a savings of over $500 since I bought my printer over 4 years ago.