ValuTrodeáFoam neurostimulation electrodes feature the same construction as ValuTrodeáCloth electrodes but with a white foam top. Every lead wire interface is customized for each electrode to optimize current distribution for all the various shapes and sizes. Featuring a multi-layer MultiStickáhydrogel, ValuTrodeáelectrodes are known for their durability and multiple applications to the skin. These electrodes each measure 3 by 5 inches and are rectangular in shape. These electrodes come in a 20 pack.