Xerox 106R01147, 106R01144, 106R01145, 106R01146 Toner Cartridge Set - Phaser 6350

These seem to be good cartridges, but they used to show for the 6300 and 6350, they will NOT work for the 6300 so had to send them back, this seemed to be wrong in Amazon's system, not the actual vendor.