Premium C544X2KG Black Toner Cartridge fully compatible with the Lexmark C544, C544DN, C544DTN, C544DW, C544N, C546, C546DTN, X543, X543DN, X544, X544DN, X544DTN, X544DW, X544N, X546, X546DTN, X548, X548DE, X548DTE. The use of compatible supplies does not void your printer warranty.