The Kendall/Covidien Medi-Trace« 200 Series Electrode - item #31050522, item EG200 is cost effective and made with foam, proprietary conductive adhesive gel and Ag/Ag chloride. It is latex free, 3.6cm in diameter and is used for general monitoring. Features: High quality foam substrate Cost effective Ag/Ag chloride Latex free 3.6cm diameter Conductive adhesive hydrogel stays fresh up to 45 days out of package Resists fluids Conforms easily to skin to ensure excellent trace quality Smaller size for convenient lead placement Teardrop shape for easy release and removal Packaged 100/pouch, 1000/case Sold by 100/pouch, 1000/case