HP C6615DN #15 Premium Compatible Black Ink Cartridges. In addition each recycled HP C6615DN cartridge has approximately 42ml of ink in it as compared to the 26 ml of ink in the HP brand product. You get approximately 38% more ink in each cartridge!

For HP DeskJet 810C / 812C / 825C / 825CVR / 840C / 841C / 842C / 843C / 845C / 920C / 940C / 940CVR / 948 / 3800 / 3820 / OfficeJet 5110 / 7130C / 7130XI / V40 / V40XI / V45 / PSC 500 / 750 / 750XI / 900 / 950