EPS Replacement 4PK Brother TN336 TN331 High Yield Replacement Toner Set for HL-L8250CDN HL-L8350CDW HL-L8350CDWT MFC-L8600CDW MFC-L8850CDW EPS toner come with LIFETIME WARRANTY. Please contact EPS directly for any questions. Customer support is 24/7. Company info is on the box. Yield : Black up to 4000 pages, color up to 3500 pages ( based on 5% coverage ) Compatiblity :Brother HL-L8250CDN, HL-L8350CDW, HL-L8350CDWT, MFC-L8600CDW, MFC-L8850CDW This replacement toner cartridge is built to ISO9001 and ISO14001 Factory Standards