Featuring 4 pairs of replacement gel pads, these regular-sized electrodes effectively target pain points on your neck, shoulders, wrists, hands, back, legs, and ankles. Crafted to accurately pinpoint areas of discomfort, they are constructed from a soft, flexible gel material designed to alleviate muscle pain and tension. These gel pads are perfectly suited for use with the Pain Therapy System, offering quick, temporary relief from neck pain. These pads are also latex-free.