The LxTek 85A Black Laser Toner Cartridge Multi Pack includes 4 pieces of toner cartridges designed for HP printers. With a laser print technology, these black cartridges are compatible with the HP 85A model and come with a manufacturer warranty of 24 months. This multi pack ensures that you have a steady supply of toner cartridges for your printing needs, making it a convenient and reliable option for your office or home use.