Sophia Global Remanufactured Ink Cartridge Replacement for HP 40 (1 Black) Page Yield: Up to 1,100 pages per black ISO 9001 Quality Certified Manufacturing Process 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. Depending on the state of the chip on the cartridge, it may read the correct ink level and it also may not. Despite the ink level reading, the cartridge should perform normally as if it were reading full and provide quality prints for the full life of the cartridge.