These printers use the 51B1000 cartridge:
Click On a Printer to View it's Cartridges
          Lexmark MS 317
          Lexmark MS 317dn
          Lexmark MS 417
          Lexmark MS 417dn
          Lexmark MS 517
          Lexmark MS 517dn
          Lexmark MS 617
          Lexmark MS 617dn
          Lexmark MX 317
          Lexmark MX 317dn
          Lexmark MX 417
          Lexmark MX 417de
          Lexmark MX 517
          Lexmark MX 517de
          Lexmark MX 617
          Lexmark MX 617de