Lexmark C540, C543, C544, X543, X544 Magenta Developer Unit: * Up to 30,000 pages average yield * Part of Lexmark"s Cartridge Collection Program * Compatible with Lexmark C540N, Lexmark C543DN, Lexmark C544DN, Lexmark C544DTN, Lexmark C544DW, Lexmark C544N, Lexmark C546DTN, Lexmark X543DN, Lexmark X544DN, Lexmark X544DTN, Lexmark X544DW, Lexmark X544N, Lexmark X546DTN, Lexmark X548DE, Lexmark X548DTE