Part
C540H1KG
is compatible in the following Printers:
Lexmark C540n
Lexmark C543dn
Lexmark C544dn
Lexmark C544dtn
Lexmark C544dw
Lexmark C546dtn
Lexmark X543dn
Lexmark X544dn
Lexmark X544dw
Lexmark X546dtn
Lexmark X548de
Lexmark X548dte