If you want to refill the BROTHER TN-310, TN-315, TN-331 or TN-336 starter cartridges provided with the printer when purchased, you will need one of this product for each cartridge since starter cartridges do not have the reset gear installed.
You'll need one reset gear for each cartridge that requires it.
You can also purchase this reset gear in a set of 4.
Each reset gear is provided with the following:
- The reset gear
- Easy and detailed instructions