Spectra par12-02 Parker Laboratories 360 Electrode Gel, 2 Oz. Tube, Clear

The only salt-free and chloride-free electrically conductive gel, recommended for all electro-medical procedures, except defibrillation. Salt-free characteristics make it particularly suitable for long-term applications. Spectra 360 differs significantly from all other electrically conductive media...It works by wetting the skin, thereby reducing skin resistance.