BROTHER GENUINE CARTRIDGE - Brother TN-660 is a Brother Genuine cartridge that produces mono laser prints in high quality you can depend on. YIELDS UP TO 2,600 PAGES -This replacement high-yield black toner cartridge can print approximately 2,600 pages(1). SEAMLESS INTEGRATION - This professional replacement black toner cartridge creates rich blacks and is engineered to work in seamless unison with your Brother laser printer.