Lexmark LEXC540A4KG LEXMARK C540N GSA SD TAA RETURN BLACK. Compatable with these models: C540DW
C540N
C543DN
C544DN
C544DTN
C544DW
C544N
C546DTN
X534DN
X544N
X546DTN
X548DE
X548DTE
X54DN
X54DTN
X54DW
C540N
C543DN
C544DN
C544DTN
C544DW
C544N
C546DTN
X534DN
X544N
X546DTN
X548DE
X548DTE
X54DN
X54DTN
X54DW