The HP Digital Copier Printer 310 uses compatible ink that replaces the HP 15 (C6615DN) black, about 840 pages, and the HP 78 (C6578AN) tri-color, about 710 pages. Both are standard capacity. The same ink also works with the HP DeskJet 920C, DeskJet 940C and OfficeJet 5110. Same-day shipping on most orders.
