Refill ink Kit with 4 colors of CIS system for HP printers that are used in HP 60 cartridge such as Photosmart C4680, C4780 This is a Uni-Kit refill ink for the HP Photosmart C4680, C4780 Printer Continuous Ink System. This refill kit is equivalent to 8 ~ 9 cartridges PER COLOR! Thats a total of about 40 ~ 45 cartridge yields all in this 1 refill kit! This Uni-Kit refill kit is the perfect buy for high volume printers The ink in this refill kit is dye based and matches the OEM quality in both quality and page yield.