Toner cartridge is designed for use with Brother DCP-1000, MFC-4800, MFC-6800, IntelliFax-2800, IntelliFax-2900 & IntelliFax-3800. All genuine Brother printer supplies are designed as part of an entire printing system to provide a superior degree of quality. Genuine Brother toner is delicately balanced to provide even flow & toner distribution. Cartridge yields approximately 2,200 letter-size pages at 5 percent coverage.