Outfitted with tungsten wire, Thomas Medical?s electrodes evenly distribute the electrical current, eliminating ?hot spots.? We offer 8 different sizes in loop electrodes, ranging from 10 x 5mm to 25 X 10mm. A standard shaft length of 13cm (5?) makes these electrodes compatible with industry standard wands. Each electrode is individually checked with the highest quality standard in the industry, delivering a clean, reliable experience.