Genuine OEM Lexmark X644 ef MFP Toners
The X644ef MFP uses Lexmark X644A standard-capacity, X644H high-yield and X644X extra-high-yield black toner. The higher-yield choices give you more printing between cartridge changes, with X644X offering the largest capacity of the three.
Toner Buzz carries genuine Lexmark toner for the X644ef MFP, along with fusers and roller parts. For maintenance, 40X2592 is a fuser assembly, while the 40X0100 kit includes a fuser and rollers; choose according to whether you need the fuser alone or those parts together.