These printers use the S051055 cartridge:

Epson EPL 5700

Epson EPL 5700 I

Epson EPL 5700 PS

Epson EPL 5800

Epson EPL 5800 L

Epson EPL 5800 Plus

Epson LP 800

Epson LP 800 /CS/SX

Epson LP 800 CS

Epson LP 800 S

Epson LP 900

Epson LP 1800

Epson LP 1900

Epson LP 1900 CN

Epson LP 1900 N