LC-900M magenta Inkjet Cartridge for FAX-1840C/1940CN, MFC-620CN/3240C/3340CN/5440CN/5840CN, DCP-310CN. MFC410CN/5540CN. Page life 400. This Brother LC-900 Inkjet Cartridge ensures high quality results with a range of Brother printers, multifunctional machines and fax machines. Brother machines work with separate ink cartridges meaning you only have to replace the empty cartridge, saving you money compared to less efficient models. Providing high quality results with rich black text and vibrant colour prints that won't smudge, this LC900M inkjet cartridge produces up to 400 A4 pages at 5% coverage.