Blue rubber bulb and conductive metal cup provide accurate signal transmission. Can be reused again and again. Each electrode consists of blue rubber bulb medium size (15mm) and small metal cup.
Adjustable screw tightening style. 4mm pin opening accepts up to 4mm banana style and straight plugs.
Equal to GE/Marquette 2029829-001, Philips 40421A, 40418A, Welch Allyn 714730.
6 welch cup style electrodes per box. Priced per box.