Massage Electrode Healthy Pads for Digital TENS Therapy Machine Electronic Cervical Vertebra Physiotherapy For Back Neck Body. Features: Suitable for electronic physiotherapy tens 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. Specifications: Material: Silicone + Gel, Size: 8 * 5 * 0.2cm, Weight: 6g / 0.22oz, Connection plug size: 3.0 mm