All genuine Brother toner cartridges are engineered as part of an integrated printing system to deliver reliable color and print quality. Toner is precisely balanced for even flow and consistent distribution. These cartridges fit Hl-3140CW, Hl-3170CDW, Hl-3180CDW, Mfc-9130CW, Mfc-9330CDW and Mfc-9340CDW. Each cartridge yields approximately 2,500 A4 or letter-size single-sided pages, and your printer will notify you when replacement is needed.