Ink4work 4 pack Remanufactured Toner Cartridge to replace HP CB540A, CB541A, CB542A, CB543A Fits Color Laserjet CM1312/CP1215/CP1515 Approximate cartridge yield: Black up to 2,200 standard pages, Color cartridge up to 1,400 pages based on 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 only by ink4work Not made by HP