This genuine Lexmark 78C20K0 black toner cartridge offers an estimated 2,000 prints before it needs replacing. Designed as a single use toner cartridge, once your original Lexmark 78C20K0 believes it is empty it will cease working, allowing you to return it to the manufacturer for free recycling.This Lexmark 78C20K0 is part of the companies famous \"Return Programme\" which offers the black toner cartridge to you at a reduced price, with the understanding that you will return it to them once you are done with the consumable. As a standard capacity Genuine Lexmark offering, the 78C20K0 has a noticeably lower price than other capacities available and is ideally suited to offices with light printing needs.