Toner cartridge is designed for use in Brother DCP-7030, DCP-7040; HL-2140, HL-2170W; MFC-7340, MFC-7345N, MFC-7440N and MFC-7840W. 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 and toner distribution. Cartridge yields approximately 1,500 pages.