... to TENS therapy device.3.The diameter of pulse voltage input, hole:2.0mm or 2.5mm4.Materials:Materials:Rubber Electrode ... Parts, Rubber Products,Silicon Rubber ,Silicon Electrode Pads.Silicon Electrode Pad Materials: different kinds of rubber, such as NBR,SBR, ... Rubber Silicon Electrode Pads,Silicon Rubber Electrode Pads,Rubber Electrode Pad,Silicon Rubber Electrode Pads,skin Rubber Electrode Pads,self- ...