Brother DR920 Drum Unit – Compatible Replacement | Castle InkThe Brother DR920 compatible drum unit is a high quality replacement for the original Brother DR920 drum assembly used in select Brother business class laser printers. If your printer shows a Replace Drum or Drum End Soon message, prints faded pages, or leaves streaks and repeating marks, replacing the drum unit will restore your print quality. Many users replace the toner cartridge when print quality drops, but in Brother laser printers the toner and