Suction cup electrodes with an internal valve and a horizontal hose connector, a major advancement over the previous classic design with the vertical hose connector. The horizontal connection eliminates hose kinking and allows for towel or hot pack placement over the electrodes. The internal valve feature keeps the electrode sealed until it is applied to the patient. This simplifies and speeds up the application of these electrodes. All of our suction cup electrodes are made of high-grade gray silicone rubber with stainless steel contact plates and are autoclavable.