The HP DeskJet 1120 Cse uses two compatible ink cartridges: black 45 (51645A), rated at about 1,100 pages, and tri-color 23 (C1823D), rated at about 690 pages. Both are standard capacity. The same supplies also fit the DeskJet 710C, DeskJet 712C and DeskJet 720C. Same-day shipping on most orders.
