Price each: $0.99
Buy 3 for $0.89 each (save 10%)
Reset gear for use in Brother TN339 toner cartridges.
These brother printers will not print if they do not detect a flag (reset) gear when the refilled cartridge is installed. The flag gear must not only be present, but must be installed correctly to reset the printer and avoid an error message.
Each kit contains: 1 reset gear + instructions for assembly (easy to do!)