VERMED SILVEREST Wet Gel Adult Diagnostic Electrode, 1 3/8" Foam, Metal Snap, 10/Strip, for Resting EKG and Echo Sound. LATEX-FREE, Hypoallergenic Adhesive. Ag/AgCl, high chloride content, wet gel for fast, clear traces. Self-adhering, no muscle artifact or repeat testing. Can be defibrillated.