Brother Genuine High-Yield Black Toner Cartridge Twin Pack TN336 2PK contains two TN336 black toner cartridges that deliver consistent, professional laser-quality prints you can rely on for up to 4,000 pages per cartridge(Approximat e toner cartridge yields in accordance with ISO/IEC 19798 (Letter/A4)) for a total of up to 8,000 pages(Approximate toner cartridge yields in accordance with ISO/IEC 19798 (Letter/A4)). The Brother Genuine laser toner 2-pack offers extra convenience - having an extra toner cartridge on hand and printing twice as many pages when you use both toner cartridges (Approximate toner cartridge yield for TN336 is up to 4,000 pages per cartridge for a total of up to 8,000 pages for two cartridges). Brother Genuine laser toner is intelligently engineered to work seamlessly with your Brother printer to consistently deliver sharp, crisp laser-quality prints that withstand the test of time. Using Brother Genuine multi-pack laser toner offers convenience and helps minimize the number of repeat toner orders you need to place. Brother offers an environmentally responsible way for customers to dispose of Brother Genuine cartridges. Visit manufacturer's website to learn more. Brother Genuine High-Yield Black Toner Cartridge Twin Pack TN336 2PK is for use with: HL-L8250CDN, HL-L8350CDW, HL-L8350CDWT, MFC-L8600CDW, MFC-L8850CDW.