The Original Samsung SCX-6320R2 Black Drum Unit provides a cost effective way of running your Printer, The SCX-6320R2 won�t need to be changed until around 20,000 pages (based on a 5% coverage) making this Genuine Samsung Drum Unit ideal for the productive office.The purpose of this Original SCX-6320R2 Black Drum Unit is to take toner from the Cartridge and to place it onto the page. Having the Drum Unit as a separate consumable often reduces the Printers running costs as you can usually achieve more from the Cartridges.