Lexmark 40X7764 is compatible in the following Printer Models:

Lexmark Multifunction Color Laser

Lexmark X950de (7558-036)
Lexmark XS950de (7558-096)
Lexmark X952de (7558-236)
Lexmark X952dte (7558-236)
Lexmark X954de (7558-436)
Lexmark X954dhe (7558-436)
Lexmark XS955de (7558-496)
Lexmark XS955dhe (7558-496)

Lexmark Color Laser

Lexmark C950de (5058-030)
Lexmark X950de (7558-036)
Lexmark XS950de (7558-096)
Lexmark X952de (7558-236)
Lexmark X952dte (7558-236)
Lexmark X954de (7558-436)
Lexmark X954dhe (7558-436)
Lexmark XS955de (7558-496)
Lexmark XS955dhe (7558-496)