Unknown Remanufactured Ink Cartridge Replacement for HP C8721WN ( Black,Cyan,Magenta,Yellow , 13-Pack ) Inkjet cartridges are brand new remanufactured (non OEM). Inkjet cartridges are all professionally tested thoroughly before they are shipped. Inkjet cartridges are manufactured with new components, new ink, and air-sealed in an ISO-9001 / ISO-14001 quality certified factory.