Cool Toner Compatible Toner Cartridge Replacement for Brother TN336 TN-336 TN331 HLL8350cdwt Toner for Brother MFC l8850cdw HL l8350cdw MFCl8850cdw Toner Printer (Black Cyan Magenta Yellow,4-Pack) MODEL - Compatible Printer Model --- Brother HL-L8250CDN HL-L8350CDW HL-L8350CDWT MFC-L8600CDW MFC-L8850CDW, Brother HL L8250CDN HL L8350CDW HL L8350CDWT MFC L8600CDW MFC L8850CDW,Brother HLL8250CDN HLL8350CDW HLL8350CDWT MFCL8600CDW MFCL8850CDW Compatible for 4Packs Compatible for Brother TN336 TN331 TN-336 Toner Cartridge High yield - Cartridge Yield: 4,000 (black) and 3,500 (color) Warranty - 3-Years Warranty; Replacement or Refund upon request Service - Phone Services for technical support