Lexmark LEX56F1X00 LEXMARK MS421DN XH RETURN PROG BLACK. Compatable with these models: MS421DN
MS421DW
MS521DN
MS621DN
MX421ADE
MX521ADE
MX521DE
MX522ADE
MX522ADHE
MX622ADE
MX622ADHE
MS421DW
MS521DN
MS621DN
MX421ADE
MX521ADE
MX521DE
MX522ADE
MX522ADHE
MX622ADE
MX622ADHE