One use these pads several times as a complimentary gel comes this Electrode Pads which applied on the prone are of the body as well as these pads to stick the pad properly so one can experience a proficient massage. These pads comes in a pack ten sheets of each having four Electrode Pads of 2" x 2", so if you are using any Tens Unit then these electrode pads are must for you and to get these pads all you need to do is to log on Amazon and place your order.