Cx725 magenta high yld rtn pr 16k lexmark return programme cartridges are patented print cartridges sold at a discount in exchange for the customer39s agreement to the licence requirement that the cartridges will be used only once and returned only to lexmark for remanufacturing andor recycling the return programme cartridges are licensed for single use only and are designed to stop working after the delivery of a fixed amount of toner a variable amount of toner will remain in the cartrid