This Brother TN-155 Toner Cartridge is perfect for producing vivid, crisp and professional looking documents. The high yield toner requires less frequent replacing, allowing you to print with fewer interruptions. •It has an estimated page yield of 4,000 pages. •The toner is designed to be used with the following Brother machines: DCP-9040CN, HL-4040CN, 4050CDN, MFC-9440CN, 9450CDN and 9840CDW. •This pack includes a single magenta toner cartridge.