Genuine Brother LC-900BK black ink cartridge, the yield is 500 pages at 5%. For use in the DCP-110C, DCP-310CN, MFC-210C, MFC-410CN, MFC-620CN, MFC-3240C, MFC-3340CN, MFC-5440CN, MFC-5840CN, FAX-1840C, FAX-1940CN and FAX-2440C