As the Original Brother DR2005 Black Imaging Drum Unit Is a brand new product designed, manufactured and tested by using Genuine Brother parts, you can enjoy long lasting reliable prints for the life of the Cartridge. The role of the Genuine DR-2005 is to take Toner powder from the Cartridge to then place accurately onto the page. This Genuine Brother Black DR 2005 Imaging Drum Unit plays an important role in keeping our prints laser accurate and clean and come with a lifespan of around 12,000 pages (based on a 5% coverage). The Original DR2005 is designed to be used in various Brother Printers, a full list of compatible Printers can be found on this page.