Compatible with most TENS, EMS, and IF units, the Vive TENS unit replacement electrode pads are 2” by 3.5” and feature 2mm pigtail lead connectors. Non-irritating to the skin, each pre-gelled pad is made with a soft, flexible fabric and a conductive hydrogel which are both latex and PVC-free. Packaged in a resealable bag with clear protective liners to prolong their lifespan, the set includes 40 reusable TENS patches, each designed for use during multiple sessions.