Gigablock CIS Refill Kit with 6 Colors UV(Ultra Violet) resistant Ink for Epson Stylus Photo R260 R280 R380 RX580 RX595 RX680 and Artisan 50 Continuous Ink System (Related Cartridge # : T078120, T078220, T078320, T078420, T078520, T078620) CIS Refill Kit with 6 Colors UV(Ultra Violet) resistant Ink for Epson Stylus Photo R260 R280 R380 RX580 RX595 RX680 and Artisan 50 Continuous Ink System (Related Cartridge # : T078120, T078220, T078320, T078420, T078520, T078620) Comes with 690ml Ink (165ml BLACK Ink,125ml YELLOW Ink,100ml CYAN Ink,100ml MAGENTAInk,100ml Light Cyan Ink,100ml Light Magenta Ink ) Equivalent to 8 ~ 9 cartridges per color; Thats a total of about 40 ~ 45 cartridge yields all in this 1 refill kit Perfect buy for high volume printers, this represents over 200% savings compared to buying new OEM cartridges The ink in this refill kit is UV(Ultra Violet) resistant Dye based and matches the OEM quality in both quality and page yield