HP DeskJet 990 Cxi Ink Cartridges

The HP DeskJet 990 Cxi uses two compatible ink cartridges. The black is the HP 45 (51645A), a standard-capacity cartridge rated at about 1,100 pages. The tri-color is the HP 78 (C6578AN), also standard capacity, at about 710 pages. The same ink also fits the DeskJet 960 Cxi, DeskJet 970 Cse, and DeskJet 950C. Same-day shipping on most orders.