TonerPlusUSA New Compatible CF280X 80X High Yield Black Laser Toner Cartridge for Laserjet Pro 400 M401dn, M401dne, M401dw, M401n, M425dn (Black, 4 Pack) RELIABLE TONER: Includes 1 Black toner cartridge. Certified ISO 9001 for quality assurance. Environment assured Certified ISO 14001. COMPATIBLE PRINTERS: HP LaserJet Pro 400 M401dn, M401dw, M401n, M425dn YIELD: 6,900 @ 5% coverage QUALITY PRINTING: Because TonerPlusUSA's extensive research and development, this compatible replacement HP black laser toner cartridge is guaranteed to be easy to install with your HP LaserJet Pro printers and give your documents outstanding print quality, clarity, and exceptional yields at a lower cost. LIFETIME GUARANTEE SAVES YOU MONEY AND HASSLE: If, for whatever reason, you don't absolutely love your print quality, just return it, and we'll replace it or give you 100% of your money back, no questions asked. We're that confident that you'll love your print quality, and will continue to use our products in the future.