BEST 4 U compatible cartridge is produced to meet the performance of original toner cartridge which is available at reasonable price. This cartridge is the compatible Samsung printer. The laser toner cartridge work quickly and effectively even when the large number of printing is commanded. You can print 1500-2000 standard pages approximately that keep the Printer running smoothly. The print out vary for photos, graphics and printing on other media but the page level are still high. Overall manufacturing defect is covered in warranty. Easy to install, just shake, remove the seal properly and install it . Our product is tested before delivery.