Brother Tn431y Genuine Yellow Toner Cartridge For Mfcl8610cdw, L8900cdw: Compatible with MFC-L8610CDW and MFC-L8900CDW Yields approximately 1,800 pages in accordance with ISO/IEC 19798 Designed as part of a complete intelligent printing system Genuine toner cartridges provide superior quality Precisely balanced for even flow and consistent distribution Manufacturer part number: TN431BK