Greencycle 2 PK Replacement toner cartridges for Brother TN-221 Black Toner Cartridge HL-3170CDW HL-3170CW Printer Color:Black Full 1 year warranty against manufacturer defects and print quality. Compatible new toner cartridges unconditionally guaranteed to provide same performance and reliability as genuine Brother toner cartridges. Yield: Toner Cartridge up to 2,500 pages at 5% coverage (Letter size Paper) Actual toner yield varies with usage, graphics printed and environmental conditions. Compatible Brother Printer below: HL-3140CW / HL-3170CDW / MFC-9130CW / MFC-9330CDW / MFC-9340CDW