Brother dr421cl drum unit brother drum units and toner cartridges work hard to ensure your device always performs its best saving you time and money this drum unit yields approx 30 000 a4 pages 1 page per job 50 000 pages 3 page per job and works with hl l8260cdw hl l8360cdw hl l9310cdw mfc l8690cdw dcp l8410cdw mfc l8900cdw mfc l9570cdw