The Dura-Stick Supreme Electrode is constructed with an even layer of pure conductive silver, a choice wire and molded connector, and conductive gel for bonding. Dura-Stick Supreme provides current dispersion and low impedance in a flexible, durable construction with  excellent adherence. Dura-Stick Supreme Blue Gel Self-Adhesive Electrode boxes come with 10 individual packages containing four electrodes per package (40 per case). These Blue Gel electrodes are highly conductive and offer superior adhesion and conformability.