Universal Compatibility: Electrode pads fit most TENS/EMS on the market 7cm*12cm [ 2.0 caliber] Premium TENS Electrodes: Improved Carbon Film, Good Conductivity, Low Impedance and Uniform Current Distribution Self-adhesive electrode pad: good stickiness, easy to grasp, easy to peel, resistant to drying Medical grade pad for TENS machine, biocompatible, non-irritating, superior environmental adaptability of hydrogel Reusable electrode pads, individually packaged for easy storage and use. Packing list: 10* electrode patch We only sell electrode patches, not other items in the picture. Due to differences in different monitors, the pictures may not reflect the actual color of the item. Due to manual measurement, please allow slight size errors.