The HP DeskJet 812C uses two compatible ink cartridges. The Black 15 (C6615DN) is standard capacity and prints about 840 pages, and the Tri-Color 23 (C1823D) is standard capacity and prints about 690 pages. The same ink also fits the HP DeskJet 810C, PSC 500 and PSC 500xi. Same-day shipping on most orders.
