These printers use the T277XL320 cartridge:

Epson Expression Photo XP-55

Epson Expression Photo XP-55 SMAll In One

Epson Expression Photo XP-750 SMAll In One

Epson Expression Photo XP-760

Epson Expression Photo XP-760 SMAll In One

Epson Expression Photo XP-850

Epson Expression Photo XP-850 SMAll In One

Epson Expression Photo XP-860

Epson Expression Photo XP-860 SMAll In One

Epson Expression Photo XP-950

Epson Expression Photo XP-950 SMAll In One

Epson Expression Photo XP-960

Epson Expression Photo XP-960 SMAll In One

Epson Expression Photo XP-970

Epson Expression Premium XP-760 SMAll In One