Laser Tek Services &reg; Black Toner Refill Kit for the HP C4127X 27X C4127A 27A LaserJet 4000 4000n 4000se 4050 4050n Kit comes with 1 Bottle, Easy Instructions, Funnel Cap, Latex Gloves if needed; Ships Directly from our warehouse within 1 business day! Each Bottle is good for at least the same page yield as a new cartridge, usually a bit more. 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!!!