Description:Each one of this package is flexible and to the touch, helping you get the most from your TENS machine. They also feature durability and re-sealable packaging for a longer lifespan. They are classic and commonly used in medical area, which makes it easier for you to find compatible accessories.Features:- Color: As shown. - Material: Silicone. - Size: 7 x 4 x 0.3cm (LxWxH). - Made of high quality, durable. - Suitable for various low 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. - Notice: Need matching with therapy equipment to realize therapy effect, normal work, should confirm the black side of electrode slice face onto your skin.