(1) one HFV Audio car audio charge / discharge resistor tool.
We have 2 models available:
Up to 10 farad model
or up to 30 farad model
 
This is an updated version that replaces the old style ones that are included with capacitors (see pic)
 
This is used to charge and discharge car audio caps before connecting to 12v power or immediately after removing from 12v power. This is great for when you lose the factory one that comes with the capacitor.
Please refer to your capacitor factory instruction manual for instructions on how to use.