Laser Tek Services &reg; 4 Pack Black Toner Refill Kit with reset chips for the Dell 1815 1815dn 310-7945 310-7943 PF658 Kit comes with 4 Bottles, Easy Instructions, Funnel Cap, Latex Gloves if needed; Toner Wipes- 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. 4 RESET CHIPS INCLUDED!!! Save big each time you refill and GO GREEN!!!