A combination of high quality adhesive and high-conductive properties make these seca Q-Trace electrodes our 'gold standard' disposable ECGelectrodes. Disposable Resting ECG electrodes with silver/silver chloride contact. Non-latex, non-PVC. High quality adhesive and high conductive properties. Manufactured by Tyco Healthcare. Single-use. Conveniently supplied in sachets, each containing 100 electrodes. These Q-Trace electrodes. Pack of 100.