Smart Ink - Your smart cartridge choice!Your printer is something you use every day, making printer ink one of the things you have to buy regularly. Unfortunately, replacing printer ink can be expensive, especially if you think your ink needs to come from the same manufacturer as your printer.With its vibrant colors and professional quality, the Compatible Ink Cartridges produced by Smart Ink are the ticket to replacing ink quickly and more affordably. These cartridges are compatible with many HP printers. You can use these cartridges for HP OfficeJet Pro 8100 N811a N811d OfficeJet Pro 8110 OfficeJet Pro 8600 Plus N911n OfficeJet Pro 8600 Premium N911g OfficeJet Pro 8600 N911a N911g N911n OfficeJet Pro 8610 8615 8616 8620 8625 8630 8640 8660 251dw 271dw 276dw printers.These Compatible 950 XL 951 XL 950XL 951XL Ink Cartridges can print out 1,500 pages per color cartridges and 2,300 pages per Black (at 5% page coverage). User Manual (added to each set)● If your printer displays a "Non-Genuine" message, press "Proceed"/"Continue"/"Accept" or "OK" to continue.● If you receive the error "Ink Cartridge not recognized" or "Missing or damaged ink," remove the indicated cartridge. Then use a dry, lint-free cloth to gently wipe the copper-colored contacts on the cartridge and carriage to remove any buildup. Replace the cartridge and make sure that it clicks securely into the corresponding slot.● If you get "Ink out/Empty/Low Ink" error, remove and reinstall indicated cartridge until it firmly seats into the slot. If all the cartridges are correctly installed, press "OK" or "Continue" to clear the message, and resume printing.