E17S BIO-POTENTIAL ELECTRODE*
A recessed pure tin electrode with a 72" (183 cm) lead wire and female socket. Designed for extra electrode placements under the cap fabric on an occasional basis. May also be used in place of E21 Disk Electrodes where a recessed electrode is preferred by using an E6 Disposable Sponge Disk to hold the Bio-Potential Electrode in place.