The HP DeskJet 720C uses two ink cartridges: a black one and a tri-color one. The compatible black ink replaces HP 45 (51645A) and prints about 1,100 pages. The compatible tri-color ink replaces HP 23 (C1823D) and prints about 690 pages. Both are standard capacity. The same supplies also fit the DeskJet 710C, DeskJet 712C and DeskJet 722C. Same-day shipping on most orders.
