Ink4work 2 Pack CF280X (80X) Compatible Toner Cartridge for HP LaserJet Pro 400 MFP M401 / M425 Laser Toner Printers Approximate cartridge yield: up to 6,900 standard pages @5% coverage of lettle size paper (average continuous black, declared yield value in accordance with ISO/IEC 19798, actual yields vary considerably based on images printed, other factors. ISO9001 certified. Sold by ink4work Replace HP CF280X Not made by HP