The dell 7Y743 Ink Cartridge Black Remanufactured Ink Cartridges are replacement ink cartridges that are manufactured not by the OEM (Original Equipment Manufacturer) dell 7Y743 Ink Cartridge Black, but by a third party. These cartridges will function and work in the same way that an OEM Ink Cartridge would. They are designed to replace the original cartridge and fit into your specific Dell printer