Compatible with HP LaserJet 4240 LaserJet 4240N LaserJet 4250 LaserJet 4250DTN LaserJet 4250DTNSL LaserJet 4250N LaserJet 4250TN LaserJet 4350 LaserJet 4350DTN LaserJet 4350DTNSL LaserJet 4350N LaserJet 4350TN. Package Content Compatible HP Q5942A (HP 42A) Black Micr Toner Cartridge. Approximate Page Yield: 10000 - Black Micr pages per cartridge at 5% coverage HP Q5942A (HP 42A) Black Micr Toner Cartridge. Prints high-quality images and texts. Microchip Included: The intelligent chips make cartridges work with your printer.