The HP OfficeJet R65 uses two compatible ink cartridges: HP 45 (51645A) in black, rated at about 1,100 pages, and HP 23 (C1823D) in tri-color, rated at about 690 pages. The same supplies also fit the OfficeJet R40, OfficeJet R45, and OfficeJet T65. Same-day shipping on most orders.
