LC-900BK Black Inkjet Cartridge to fit FAX-1840C/1940CN, MFC-620CN/3240C/3340CN/5440CN/5840CN, MFC410CN/5540CN. DCP-310CN/8040/8045D. Page life 500. With a reputation for quality, reliable components, you can trust in Brother LC900 ink cartridges for superior standard, high resolution results. Brother printer machines work with separate ink cartridges meaning you only have to replace the empty cartridge, thereby saving you money. Providing high quality results with rich black text and vibrant colour prints that won't smudge, this inkjet cartridge produces up to 500 A4 pages at 5% coverage.