Suitable for various medium frequency electronic physiotherapy machine. Help to improve blood circulation, promote metabolism and eliminate fatigue. Self adhesive, high adhesive, convenient to use and reusable. Useful and safe accessory for medical care. 1. Non-woven Fabric electrode Pads 2. Self Adhesive, Re-usable, Long Life 3. Bio-compatible, Dry out Resisting 4. Lower Impedance, More uniform current distribution, 5. No hot spots, more stimulation comfort. 6. Durable construction: can even pull out from the lead wire without damage. 7. unlike others, not plastic 8. Specially designed holes, on each pad, to release the generated heat and give more comfort and less irritation. 9. Specially selected size 4 x 4 cm , Larger pads had no additional benefits, just more heating or irritation of the skin! Note:Cleanse your skin before using electrode pads for better results. Specifications: Material: Silicone and Gel Size(1pc): 4 x 4 x 0.2cm or 1.6 x 1.6 x 0.1in Fit 3.5mm plug. Package include:10X4x4cm Replacement Pads Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store