The HP C4127X Ultraprecise Print Cartridge prints approximately 10, 000 pages and is perfect for medium to high volume users who value the added convenience of increased output and a lower overall cost of ownership. It is designed for the HP LaserJet 4000 and 4050 Series printers to ensure optimum print quality. Yield: 10, 000 pages, based on 5% average coverage. ¤¤The C4127X Print Cartridge offers 65% higher capacity for excellent value - 20% cost-per-page savings. With features like Dual Polymer Toner particles, Helical Roller Drive, Magnetic Seals, and HP Pull Tabs, HP Ultraprecise cartridges set the standard for optimum quality output.