These snap electrodes provide the same signal transmission as reusable electrodes, with added convenience and hygiene. Each peel-and-stick electrode is pre-gelled and designed for one use only. Use disposable snap electrodes with the LEAD110 series electrode leads. For best performance, use the LEAD110S-R and LEAD110S-W shielded leads for your recording electrodes and the LEAD110 unshielded lead for your ground or reference electrodes. These fixed spacing, paired electrodes are primarily used for peripheral stimulation and recording for nerve conduction measurements. These paired electrodes are also useful for cardiac output, electrical bio-impedance and general-purpose EMG measurements. The pre-gelled electrode pairs have a circular contact area with a 1cm diameter and are placed 41mm apart (center to center) on 41mm x 82mm x 1.5mm thick foam. EL500-6 Paired (Dual) Electrodes (Pkg. 150 pairs) EL500-6$215.00 Same Day Shipping - orders with UPS Red or Blue shipping will be shipped the same day if received by 3 p.m. PT (Monday-Friday).