Compatible with HP LaserJet 5MP LaserJet 5P LaserJet 6MP LaserJet 6P LaserJet 6P SE LaserJet 6PXI. Package Content Compatible HP C3903A (HP 03A) Black Micr Toner Cartridge. Approximate Page Yield: 4000 - Black Micr pages per cartridge at 5% coverage HP C3903A (HP 03A) Black Micr Toner Cartridge. Prints high-quality images and texts. Microchip Included: The intelligent chips make cartridges work with your printer.