Photoconductor unit is designed for use with Lexmark C540N, C543DN, C544DN, C544DTN, C544DW, C544N, C546DTN, X543DN, X544DN, X544DTN, X544DW, X544N and X546DTN for outstanding results page after page, year after year. Superior Lexmark design means precision pairing between printer and cartridge for value, quality and environmental responsibility you can count on. Photoconductor unit lasts 30,000 pages.