Recommend UseEcho, ER, Short Term Monitoring Backing Enhanced Foam - The protective foam backing is impermeable to liquids Adhesive AQUA-TAC - Solid adhesive gel electrodes add the benefit of 100% skin surface contact. It leaves no residue upon removal. ConnectorSnap, Ag/AgCI Stud Size50 x 55mm - Adult Packaging30/Pouch, 1500/Box, 6000/Case - Sold by the BoxComparable To:3M 2257, 2259, 2270, 2287Conmed 1590, 1800, 1870Kendall-LTP 200, 530, 7161, 9131Nikomed USA 2010Vermed A10005-1-60 ...