Electrodes, TENS, Misc. - AdvanTrode Essential Electrode, 2" round, white, 40/box : AdvanTrode Essential electrode is for general use, cost effective electrodes that provide comfort and reusability without sacrificing quality. Uses industry leading hydrogel for durability. Copper stranded wire for enhanced current dispersion; tab and molded grip prevent wire pull out, spun lace topcoat for comfort and flexibility. 4/sheet; 10 sheets/case.