This is a two-cartridge pack of Original HP 650 Ink Advantage cartridges in retail blister packaging, containing one HP 650 Black and one HP 650 Tri-colour cartridge so you can replace both inks together. HP 650 is the Ink Advantage cartridge line for HP's affordable DeskJet Ink Advantage printers and all-in-ones, including the DeskJet Ink Advantage 2515 series. The black cartridge uses pigment-based ink for crisp text and is rated by HP at approximately 360 pages; the tri-colour cartridge contains cyan, magenta and yellow dye-based ink for colour documents, flyers and photos and is rated at approximately 200 pages (standard yields based on HP testing; actual yield varies). Original HP cartridges are formulated to avoid leaks and printhead damage, are made with up to 70% recycled content, and are warranted to be free from defects in materials and workmanship. Buying the black and colour cartridges as one pack is convenient for homes, students and small offices that print a mix of text and colour. Check that your printer uses HP 650 cartridges before ordering.