These printers use the T043120 (High Capacity) cartridge:

Epson CX 6400

Epson Stylus C-84

Epson Stylus C-84 N

Epson Stylus C-84 WIFI

Epson Stylus C-84 WN

Epson Stylus C-86

Epson Stylus CX-6400

Epson Stylus CX-6600