Genuine Lexmark Original 5K Yield Toner Cartridge Toner Cartridge: Made by Lexmark Oem PART # 50F1000 Also called: 501 For Lexmark Models: Lexmark MS610de Lexmark MS610dn Lexmark MS510dn Lexmark MS410dn Lexmark MS310dn Lexmark MS410d Lexmark MS310d Lexmark MS610dtn Lexmark MS610dte