Sophia Global Remanufactured Ink Cartridge Replacement for HP 934XL (1 Black) Backed by a 100% Guarantee and a Two-Year Warranty ISO 9001 Quality Certified Manufacturing Process Up to 1000 pages This cartridge was professionally remanufactured in an ISO 9001 factory. This cartridge was used once and then sent to our factory where it underwent an extensive process including, cleaning, testing the chip, and ink refilling. Before being sealed, the cartridge was tested in a live printer to ensure crisp text and true color reproduction. The cartridge was finally sealed and placed in a static protective bag.