Brother TN-320BK Toner Cartridge Black TN320BKBrother's TN 320BK black laser toner is specially formulated to ensure quality, high resolution results. With Brother laser machines the toner and drum units work independently so when one unit runs out, you don't have to replace both, resulting in reduced waste and significant cost savings. With a standard page yield of approximately 2,500 pages at 5% coverage, Brother's toner cartridges provide excellent value for money. Colour: Black Page yield: Up