... impedance and excellent conductivity 3.USA Gel,self gel tens electrodes(electrode pads,reusable electrode,self-adhesive electrode,massage ... ,ems electrode,electrotherapy electrode,physiotherapy electrode,adhesive electrode pads,tens units)Size:40mm diametershape:roundSoft cloth and foam backing for ... listedISO13485Packing: usually 4 pieces/pack into sealed plastic bag Tens electrodes for tens units