The HP DeskJet 810C uses two compatible ink cartridges: HP 15 (C6615DN) for black, at about 840 pages, and HP 23 (C1823D) for tri-color, at about 690 pages. Both are standard capacity. The same ink also fits the DeskJet 812C, PSC 500 and PSC 500xi. Same-day shipping on most orders.
