Motor Brush Cap
Fits Better Packages electric gummed tape dispensers: BP500, BP555e Series.
When removing caps use caution. They screw in to a plastic housing that's glued to the metal motor. When reinstalling them use very little torque to tighten. If the cap is overtightened, it can cause the plastic threading glued to the motor to snap off, and the motor will need to be replaced.
Note: Picture shows two different views. Two required per machine, sold in singles.