Lexmark 40X0799 is compatible in the following Printer Models:

Lexmark Multifunction Mono Laser

Lexmark X850e (7500-000)

Lexmark X852e (7500-100)

Lexmark X854e (7500-200)

Lexmark Mono Laser

Lexmark W840 (4024-000)

Lexmark W840dn (4024-010)

Lexmark W840n (4024-010)

Lexmark W850dn (4024-110)

Lexmark W850n (4024-110)

Lexmark X850e (7500-000)

Lexmark X852e (7500-100)

Lexmark X854e (7500-200)