Generic  GOLD Compatible Ink Cartridge Replacement for HP 51645A ( Black ) Compatible Combo Black Color Remanufactured Ink Cartridge Replacement for HP # 45 (51645A) and HP #78 (C6578A) 42 (ml) black ink volume + 13x3 (ml) color ink volume These are remanufactured ink cartridges in New Sealed Retail Packages. ISO 9001 Certified. 100% quality guaranteed. 100% satisfaction guaranteed.