The 4PK DR223CL Drum Unit for Brother HL-L3710CW L3290CDW MFC-L3750CDW DR223CL is a high-quality drum unit designed for use with various Brother printers. This black drum unit is compatible with models such as HL-L3230CDW, HL-L3210CW, MFC-L3710CW, MFC-L3770CDW, and more. With a page yield of up to 18,600 pages at 5% coverage, this drum unit is perfect for use in offices, schools, hospitals, banks, and other settings. The manufacturer offers a 2-year warranty and has a 100% positive response rating, ensuring reliability and satisfaction with every purchase.