ElectraStim electroconductive gel has been specially formulated for use with our external electrodes. Using just a little of this clear gel will improve conductivity so youll feel more sensation during play.Use just a little to lubricate cock rings, pinwheels, clamps and other estim sex toys designed for external use. Just apply a pea sized amount to the metal contacts before you connect your electrode to your stimulator. Each 60ml tube will last a long time as only a little gel is required to feel the effects.