MTI Compatible Color Toner Set (CMYK Standard Yield) for Lexmark C540, C540N, C543, C543DN, C544, C544DN, C544DTN, C544DW, C546, C546DTN, X543, X543DN, X544, X544DNX, 544DTN, X544DW, X544N, X546, X546DTN, X548, X548DE, X548DTE Color: CMYK | Yield: 2,000 pages for colors; 2,500 for black based on 5% coverage Replaces Lexmark Part #s: C540H2KG, C540H2CG, C540H2YG, C540H2MG Compatible Printers: Lexmark C540, C540N, C543, C543DN, C544, C544DN, C544DTN, C544DW, C546, C546DTN, X543, X543DN, X544, X544DNX, 544DTN, X544DW, X544N, X546, X546DTN, X548, X548DE, X548DTE If you do not receive your product in an MTI-branded box, it is not a genuine MTI product. Let Amazon know.