AMBU BLUE SENSOR STRESS EKG ELECTRODES (R-00-S) - The large Ambu Blue Sensor R features highly conductive wet gel, superior adhesion, and a large measuring area to ensure an optimal signal during stress tests and medium to long-term applications. Thanks to the comfortable foam backing, the electrode is gentle to the skin. 48mm diameter. Packaged 25/BG, 20BG/BX, 2BX/CS. Priced per bag.