This is a twin pack of Original HP 123 Black ink cartridges in retail blister packaging, giving you two black cartridges in one purchase for printers that go through black ink faster than colour. HP 123 cartridges fit HP's compact inkjet printers and all-in-ones such as the HP DeskJet 2130 and DeskJet 2622. The black ink is pigment-based, which produces sharp, dark text that resists smudging and suits school assignments, invoices, letters and everyday documents. HP rates each HP 123 Black cartridge at approximately 120 pages at standard yield (based on HP testing; actual yield depends on the content printed and printing habits), so the pack covers roughly 240 pages in total. Original HP ink is designed with the printer for reliable, consistent output, and each cartridge is warranted by HP to be free from defects in materials and workmanship. Keeping a spare black cartridge on hand avoids running out mid-job in a home office or small business. Make sure your printer uses the standard HP 123 cartridge before ordering; a colour cartridge is not included in this pack.