These printers use the T042420 cartridge:

Epson C 82 WN

Epson CX 5200

Epson CX 5400

Epson Stylus C-82

Epson Stylus C-82 N

Epson Stylus C-82 WN

Epson Stylus Cx-5100

Epson Stylus CX-5200

Epson Stylus Cx-5300

Epson Stylus CX-5400