These printers use the T512020-S cartridge:
Click On a Printer to View it's Cartridges
          Epson EcoTank ET-7700
          Epson EcoTank ET-7750
          Epson Expression ET-7700 ECOTANK
          Epson Expression Premium ET 7700 ECOTANK All In One
          Epson Expression Premium ET-7750
          Epson Expression Premium ET 7750 ECOTANK Wide-Forma