This HP 305XL pack combines the two high-yield original cartridges used by HP's DeskJet 2300/2700/4100-series and ENVY 6000/6400-series home printers: the HP 305XL black and the HP 305XL tri-colour. The black cartridge uses pigment-based ink for sharp, dark text, while the tri-colour cartridge holds dye-based cyan, magenta and yellow inks for colour documents, charts, school projects and everyday photos. Buying both together means a household or home office can replace a full set at once. The XL versions hold more ink than the standard HP 305 cartridges, reducing the cost per page. HP lists compatibility with the DeskJet 2300, 2700, 2700e, 2730, 2810e, 2820e, 2821e, 2822e, 2823e, 2825e, 2827e, 2842e, 4100, 4100e, 4134, 4210e, 4220e, 4222e, 4227e and 4230e, and the ENVY 6000e, 6010, 6020, 6022, 6030, 6032, 6400e, 6420, 6420e, 6422, 6430 and 6432. Each cartridge includes HP's integrated printhead, so replacing a cartridge also renews the printhead.