These printers use the T512120-S cartridge:

Epson EcoTank ET-7700

Epson EcoTank ET-7750

Epson Expression ET-7700 ECOTANK

Epson Expression ET-7750 ECOTANK

Epson Expression Premium ET 7700 ECOTANK All In One

Epson Expression Premium ET-7750

Epson Expression Premium ET 7750 ECOTANK Wide-Forma