Specification: Material: non-woven fabric, silicone Size: 3*4cm; 4.5*7.5cm; 5*9*1cm; Package inclulding: 20pc Snap Electrodes Pads Use a new pad to relieve pain-replace your tired TENS massage pad with a new set of high-quality electrode pads. They are packaged in a sealed package to ensure lasting freshness Long-lasting massage cushions-made of high-quality components, it can ensure that these cushions can be used for a long time. For best results, use them after cleaning your knees, shoulders, arms, legs or skin Keep your TENS machine working hard-our TENS machine replacement pad set comes with 16 high-quality electrode pads. Therefore, you can rest assured to maintain sufficient supply for a long time Thick, reusable hydrogel layer with medical grade non-woven material backing These self-adhesive, very flexible, conductive electrode pads do not require additional creams or gels