The HP OfficeJet T65xi 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. Both are standard capacity. The same ink also works with the HP OfficeJet R40, OfficeJet R45 and OfficeJet T65. Same-day shipping on most orders.
