This professionally remanufactured Epson black (T559120) inkjet cartridge is an original Epson T5591/T559120 ink-jet cartridge which has been through one cycle of service and has been recharged. This Epson black T559120 ink cartridge has been thoroughly cleaned along with the printhead nozzles. Then the Epson T559120 was filled with the same ink formula, the internal back pressure was insured, the shell was inspected for any possible leakage and the electrical circuitry was tested before finally undergoing an actual print test. The ink monitoring chip on this remanufactured Epson T559120 is the original chip which has been reset to provide accurate ink monitoring. If the T5591 black inkjet cartridge passes our rigid standards, it has been remanufactured for your Epson printer! We offer a 100% Quality Satisfaction Guarantee on our remanufactured T559120 black ink cartridge.