These printers use the TD55K cartridge:

Samsung ML 5000 A

Samsung ML 5000 G

Samsung ML 5000 Series

Samsung ML 5050 G

Samsung ML 5100 A

Samsung ML 5200 A

Samsung ML 5200 G

Samsung ML 5500

Samsung QL 5100 A

Samsung QwikLaser 5100

Samsung QwikLaser 5100 A