Laser Tek Services Compatible Toner Cartridge Replacement for HP 6850689 ( Black , 4 pk ) Kit comes with 4 Bottles, Easy Instructions, Funnel Cap, Latex Gloves if needed; Toner Wipes- These cloths are chemically treated to attract toner dust. Each Bottle is good for at least the same page yield as a new cartridge, usually a bit more. Product is guaranteed to be same quality print, Bottle size may vary BUT gram load is always the same. Great phone support with Laser Tek Services, not usually needed, but if you need it we are there for you. Save big each time you refill and GO GREEN!!!