INK4WORK Compatible Toner Cartridge Replacement for HP CF280A 80A LaserJet Pro 400 MFP M401 M425 Printers (Black, 2-Pack) Approximate cartridge yield: up to 2,700 standard pages each cartridge (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 CF280A Not made by HP