Printronic Remanufactured HP 950xl CN045AN 2 Black for OfficeJet Pro 251dw OfficeJet Pro 276dw OfficeJetPro 8100 OfficeJetPro 8600 OfficeJet Pro 8600 Plus OfficeJet Pro 8600 Premium Ink Cartridges for Inkjet Printers (2 Pack) Brand: Printronic These are remanufactured ink cartridges. One year factory warranty against product defect. When installing the cartridge you may receive a low ink alert such as, Refilled or Depleted Cartridge Detected. Please press CONTINUE or OK to continue printing. Ink levels are NOT accurate for remanufactured cartridges because the cartridge chip is unable to be reset. After installing you may also receive an alert that says, Used, Refilled, or Counterfeit Cartridge Detected. This alert is triggered because the printer recognizes the remanufactured cartridge as a refilled cartridge. Please press CONTINUE or OK to continue printing.