This professionally remanufactured Epson T559420 Yellow inkjet cartridge is an original Epson T559420 / T5594 ink-jet cartridge which has been through one cycle of service and has been recharged. This Epson Yellow T559420 ink cartridge has been thoroughly cleaned along with the printhead nozzles. Then the Epson T559420 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 T559420 is the original chip which has been reset to provide accurate ink monitoring. If the T5594 Yellow inkjet cartridge passes our rigid standards, it has been remanufactured for your Epson printer! We offer a 100% Quality Satisfaction Guarantee on our remanufactured T559420 Yellow ink cartridge.