Brother DR-321CL Drum Unit DR321CLThe Brother DR 321CL Drum Unit replaces and refreshes the laser printing assembly at the heart of your laser printer giving you continued crisp output that looks as good as new. Brother printers feature a separate toner cartridge and drum unit which means that they only need to be replaced when necessary. Designed for use for up to 25,000 pages. Genuine Brother consumable for reliable operation Page yield: up to 25,000 Compatible with: DCP L8400CDN,