The genuine Brother TN3390 toner cartridge multi-pack gives you a quality of print that is unreachable with any compatible product. You really cannot find any alternative to a brand new super high capacity Brother TN3390 toner cartridge that offers superior results!The high print quality, and high 12,000 page estimated yield per cartridge, is thanks to Brother designing the TN3390 super high capacity toner cartridge to work perfectly with all of the printers found listed on this page. Brother guarantee each of the TN3390 toner cartridge directly, and although it is incredibly unlikely, will intervene in the event of a problem with their genuine product.