Our Inkjets.com brand of Compatible Brother TN439Y Toner Cartridge is a cost-effective alternative to OEM branded toner cartridges. Our Compatible Cartridge will replace the TN439Y and TN436Y. It is an Ultra High-Yield toner cartridge which means more toner is included in the product, and can product and estimated 9,000 pages of prints. This product comes with a 1-year warranty from the original purchase date, and our compatible toner cartridge will work with the following Brother printer models, HL-L9310CDW, HL-L9310CDWT, HL-L9310CDWTT, MFC-L9570CDW, MFC-L9570CDWT, and more as they are released.