A Core deposit is a form of deposit you pay until returning your old part. If you don't have the core at the time of purchase, you must pay the core charge. That charge is refunded to you when you return the core.
Cole Hersee Heavy Duty Rheostat Switch
For control of panel lamp intensity, variable speed defroster fan motors and heater blowers.
8.0 ohm resistance.
Two screw terminals.
For 12 volt, DC electrical systems.
Ceramic insulator with embedded coil.
Effective heat dissipation.
Black plastic knob with metal insert and set screw.