RICOH C840S Toner Cartridge Set of 4 Colors - Model: C840S - Color: Black - Color: Cyan - Color: Magenta - Color: Yellow - Product Type: Toner Cartridge In the event of a defective product, we will exchange it if we have stock, or provide a refund if we do not, within one week of the product's arrival. (We manage by lot number, so return of the product is required.)