These printers use the 18C1428 cartridge:

Lexmark X 2500

Lexmark X 2530

Lexmark X 2550

Lexmark X 5070

Lexmark X 5075

Lexmark X 5320

Lexmark X 5340

Lexmark X 5410

Lexmark X 5495

Lexmark Z 845

Lexmark Z 1300

Lexmark Z 1310

Lexmark Z 1320