Epson Ultrachrome GS2 Ink Cartridges 700mil are compatible with the Epson SureColor S30670 & S50670 (note white ink is 600 ml).
EPSON ULTRACHROME GS2 BLACK INK CARTRIDGE 700ml
ITEM # EP T689100
EPSON ULTRACHROME GS2 CYAN INK CARTRIDGE 700ml
ITEM # EP T689200
EPSON ULTRACHROME GS2 MAGENTA INK CARTRIDGE 700ml
ITEM # EP T689300
EPSON ULTRACHROME GS2 YELLOW INK CARTRIDGE 700ml
ITEM # EP T689400
EPSON ULTRACHROME GS2/GSX WHITE INK CARTRIDGE 600ml
ITEM # EP T715A00