Brother DR223CL Color Drum Unit – Compatible Replacement | Castle InkThe Brother DR223CL compatible drum unit is a complete replacement drum assembly designed for Brother color laser printers that use TN223 and TN227 toner cartridges. If your printer is showing a Replace Drum message, printing faded colors, or producing vertical streaks and repeating marks, replacing the drum unit will restore your print quality. Many users mistakenly replace toner cartridges when print quality drops. However, in Brother printers the