Laser Tek Services &reg; Black Toner Refill Kit for the HP LaserJet 4100 4100dtn 4100n 4100tn C8061X 61X C8061A 61A Kit comes with 1 Bottle, Easy Instructions, Funnel Cap, and 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!!!