These printers use the 51B1X00 cartridge:
Click On a Printer to View it's Cartridges
Lexmark MS 517
Lexmark MS 517dn
Lexmark MS 617
Lexmark MS 617dn
Lexmark MX 417
Lexmark MX 417de
Lexmark MX 517
Lexmark MX 517de
Lexmark MX 617
Lexmark MX 617de