Brother genuine TN221BK 2-pack standard yield black toner cartridges has an estimated yield upto 2,500 page each. Compatible devices are HL-3140CW, HL-3170CDW, hl-3180cdw, MFC-9130CW, MFC-9330CDW, and MFC-9340CDW. Brother Genuine toner is intelligently engineered to work in seamless unison with your Brother printer to provide high-quality, reliable results .Manufacturer part number TN221K - 2Pack.