This professionally remanufactured Lexmark 18C1974 (#4) black ink cartridge is an original Lexmark 18C1974 (Lexmark 4) inkjet cartridge which has been through one cycle of service and has been recharged. The 18C1974 cartridge has been thoroughly cleaned along with the printhead nozzles. Then the OEM 18C1974 was inspected for any possible shell leakage, tested on the operation of all electrical circuitry and finally run through an actual print test. If the cartridge passes our rigid standards, it is a remanufactured 18C1974 for your Lexmark printer! Our remanufactured Lexmark #4 ink cartridge replaces the 18C1974 and 18C1954 OEM part numbers. We offer a 100% Quality Satisfaction Guarantee on our remanufactured 18C1974 ink cartridge.