Media Sciences Remanufactured Black Toner Cartridge for HL-3140CW, HL-3170CDW, MFC-9130CW, MFC-9330CDW, MFC-9340CDW (Alternative for Brother TN221BK) (2,500 Yield). Media Sciences compatible toner cartridges are available for a large and growing number of monochrome and color printers, enabling businesses of all sizes to reduce their printer supplies costs without sacrificing quality, color reproduction or performance.