Brother DR-3400 Drum Unit DR3400The Brother DR 3400 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 30,000 pages. Genuine Brother consumable for reliable operation Page yield: up to 30,000 Compatible with: HL L5050DN, HL