Cardinal Health Covidien Medi-Trace™ 100 Series Foam EKG Electrodes (31118733) - The MEDI-TRACE™ 100 series has a smaller, teardrop shape footprint for convenient lead placement on small or pediatric patients. The low profile foam substrate is fluid and tear resistant. The patented conductive adhesive hydrogel maximizes adhesion and is designed to stay fresh up to 45 days out of the package. Size: just 1" diameter. 100/PK, 10PK/CS. Price per pack.