Laser Tek Services&reg; Black Toner Refill Kit with reset chip for the Lexmark T520 T520dn T522n T522dn X520 X522 12A6735 Kit comes with 1 Bottle, Easy Instructions, Funnel Cap, Latex Gloves if needed; Toner Wipes- These cloths are chemically treated to attract toner dust. Product is guaranteed to be same quality print, Bottle size may vary BUT gram load is always the same. Each Bottle is good for at least the same page yield as a new cartridge, usually a bit more. Product Comes with a 1 year 100% Satisfaction Guarantee! Laser Tek Servicesoffers free technical support for any questions you may have. Save big each time you refill and GO GREEN!!!