Smart Chip for LEXMARK - C540, C543, C544, C546, X543, X544, X546, X548 - BLACK - InkOwl
Amazon.com: Lexmark C540, C543, C544, C546, X543, X544, X546 Series High Yield Magenta Return Program Toner Cartridge (2,000 Yield), Part Number C540H1MG : Office Products