The HP DeskJet 959C uses two compatible ink cartridges: black HP 45 (51645A), rated at about 1,100 pages, and tri-color HP 78 (C6578AN), rated at about 710 pages. Both are standard capacity. The same ink also fits the DeskJet 930C, DeskJet 932C and DeskJet 935C. Same-day shipping on most orders.
