Kyocera TK-542 Mita Laser Toner Cartridge, Black, Compatible - 4inkjets
Amazon.com: Kyocera 1T02HL0US0 Model TK-542K Black Toner Cartridge For use with Kyocera FS-C5100DN Color Network Laser Printer, Up to 5000 Pages Yield at 5% Average Coverage : Office Products