Laser Tek Services &reg; 4 Pack Black Toner Refill Kit with reset chips for the HP LaserJet 3500 Q2670A Q2671A Q2672A Q2673A Kit comes with 4 Bottles, Easy Instructions, Funnel Cap, Latex Gloves if needed, and reset Chips 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!!!