Genuine OEM Sharp MX-4140N Toners

The MX-4140N's supply names don't all start with the same number. Its toner cartridges are MX51, while its drum is MX31NRSA. The drum is a separate maintenance product, so ordering MX51 toner doesn't also provide a drum.

Toner Buzz carries genuine Sharp MX51 toner individually and in a complete four-color set. The set combines black, cyan, magenta and yellow; individual cartridges let you order one color. Black and tri-color MX51 developer options and the MX31NRSA drum are separate maintenance purchases.