As the very cheapest black original toner cartridge available for the Lexmark CS820de (and all other compatible printers, the Lexmark 72K20K0 is limited in its page yield. Capable of producing an estimated 8,000 pages the 72K20K0`s life is a little short, but if your requirements are not overly intense it may be a good fit for you.This genuine Lexmark 72K20K0 toner cartridge gives an exceptional quality of print that is unrivalled by any alternative products. If the results are of paramount importance to you then consider the Lexmark 72K20K0 toner cartridge.