Compatible Twin Pack Lexmark X644H21E Black High Yield Toner Cartridges - Printerinks.com
LD Remanufactured Replacements for Lexmark X644H11A Set of 5 High Yield Black Laser Toner Cartridges for use in Lexmark X642e, X644e, X646dte, X646e, and X646ef s - Walmart.com
Amazon.com: United States Toner brand Lexmark X642e, X644e, X646e High Yield Compatible Toner Cartridge for use in Lexmark series Laser Printers, STMC Certified for Professional Quality (X644H11A). Warranty only valid when purchased