Brother Genuine Drum Unit. All Brother Genuine supplies are designed as part of a complete intelligent printing system to provide superior quality. Designed for easy installation. Professional mono print quality you can consistently rely on for 12,000 pages. Intelligently engineered to work in seamless unison with your Brother printer. Brother Genuine toner produces crisp mono laser printers that withstand the test of time. Brother offers a way for customers to dispose of Brother Genuine cartridges. Visit Brother's website to learn more.