Speedy Inks - Brother Compatible 4pk TN221 Black Toner Cartridge TN221BK Page Yield: 2500 | Pack of 4 | Color: Black Compatible Printers: HL-3140CW, HL-3170CDW, MFC-9130CW, MFC-9330CDW, MFC-9340CDW Premium Quality Replacement Toner Cartridge is made by ISO9001 Certified Factory to Meet OEM Standards Shelf Life: 24-36 Months The use of aftermarket replacement cartridges and supplies does not void your printer's warranty