If the cartridge that you are trying to refill was the original cartridge shipped with your printer, you will need to purchase this product because such a cartridge will not already have a flag gear installed.
You will need one flag gear per starter cartridge.
Flag gears are also available in a pack of 4.
Each Flag Gear Kit contains the following:
- 1 Flag Gear for TN-339
- 1 Spring
- Easy detailed graphic instructions